18746697057 has 64 divisors (see below), whose sum is σ = 28271738880. Its totient is φ = 10951617600.

The previous prime is 18746697043. The next prime is 18746697097. The reversal of 18746697057 is 75079664781.

It is a de Polignac number, because none of the positive numbers 2^k-18746697057 is a prime.

It is a super-2 number, since 2×18746697057² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18746697007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56636382 + ... + 56636712.

It is an arithmetic number, because the mean of its divisors is an integer number (441745920).

Almost surely, 2^18746697057 is an apocalyptic number.

It is an amenable number.

18746697057 is a deficient number, since it is larger than the sum of its proper divisors (9525041823).

18746697057 is a wasteful number, since it uses less digits than its factorization.

18746697057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794.

The product of its (nonzero) digits is 17781120, while the sum is 60.

The spelling of 18746697057 in words is "eighteen billion, seven hundred forty-six million, six hundred ninety-seven thousand, fifty-seven".