Those Fascinating Numbers 353
16 720 797 973 (= 115 · 473)
the 10
000th
3-powerful number (see the number 216).
19 391 512 145
the
16th
Euler number (see the number 272).
21 111 311 232
the
19th
insolite number (see the number 111).
22 801 415 981
the 1 000 000
000th
prime power, in fact here a prime number (see the number
419).
22 801 763 489
the 1 000 000 000th prime number (see the number 541).
23 040 925 705
the fifth number which can be written as the sum of the cubes of its prime
factors:
23 040 925 705 = 5 · 7 · 167 · 1453 · 2713 =
53
+
73
+
1673
+
14533
+
27133
(see the number 378).
24 423 128 562 (= 2 · 3 · 7 · 43 · 3041 · 4 447)
the sixth Giuga number (see the number 30).
24 749 911 296
the third number n 1 whose sum of digits is equal to
6

n (see the number
34 012 224).
25 056 082 087
the smallest prime number which is followed by at least 400 consecutive compos-
ite numbers (in fact here by exactly 455 composite numbers); see the number
370 261.
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