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19708108670 = 2517237963803
BaseRepresentation
bin10010010110101100…
…011101111101111110
31212212111021122121202
4102112230131331332
5310330233434140
613015341055502
71265246105525
oct222654357576
955774248552
1019708108670
1183a3793818
1239a0257592
131b21088883
14d4d6234bc
157a530e915
hex496b1df7e

19708108670 has 64 divisors (see below), whose sum is σ = 39691192320. Its totient is φ = 7006990848.

The previous prime is 19708108669. The next prime is 19708108681. The reversal of 19708108670 is 7680180791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276989 + ... + 340791.

It is an arithmetic number, because the mean of its divisors is an integer number (620174880).

Almost surely, 219708108670 is an apocalyptic number.

19708108670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19708108670 is an abundant number, since it is smaller than the sum of its proper divisors (19983083650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19708108670 is a wasteful number, since it uses less digits than its factorization.

19708108670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63929.

The product of its (nonzero) digits is 169344, while the sum is 47.

The spelling of 19708108670 in words is "nineteen billion, seven hundred eight million, one hundred eight thousand, six hundred seventy".

Divisors: 1 2 5 10 17 23 34 46 79 85 115 158 170 230 391 395 782 790 1343 1817 1955 2686 3634 3910 6715 9085 13430 18170 30889 61778 63803 127606 154445 308890 319015 638030 1084651 1467469 2169302 2934938 5040437 5423255 7337345 10080874 10846510 14674690 24946973 25202185 49893946 50404370 85687429 115930051 124734865 171374858 231860102 249469730 428437145 579650255 856874290 1159300510 1970810867 3941621734 9854054335 19708108670