18700978075 has 36 divisors (see below), whose sum is σ = 25183354680. Its totient is φ = 13769733120.

The previous prime is 18700977991. The next prime is 18700978103. The reversal of 18700978075 is 57087900781.

It is a de Polignac number, because none of the positive numbers 2^k-18700978075 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1485156 + ... + 1497694.

It is an arithmetic number, because the mean of its divisors is an integer number (699537630).

Almost surely, 2^18700978075 is an apocalyptic number.

18700978075 is a deficient number, since it is larger than the sum of its proper divisors (6482376605).

18700978075 is a wasteful number, since it uses less digits than its factorization.

18700978075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12928 (or 12910 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 52.

The spelling of 18700978075 in words is "eighteen billion, seven hundred million, nine hundred seventy-eight thousand, seventy-five".