18913279870 has 16 divisors (see below), whose sum is σ = 34768243008. Its totient is φ = 7404347680.

The previous prime is 18913279849. The next prime is 18913279883. The reversal of 18913279870 is 7897231981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20120041 + ... + 20120980.

It is an arithmetic number, because the mean of its divisors is an integer number (2173015188).

Almost surely, 2^18913279870 is an apocalyptic number.

18913279870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18913279870 is a deficient number, since it is larger than the sum of its proper divisors (15854963138).

18913279870 is a wasteful number, since it uses less digits than its factorization.

18913279870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40241075.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 18913279870 in words is "eighteen billion, nine hundred thirteen million, two hundred seventy-nine thousand, eight hundred seventy".