18666702956 has 24 divisors (see below), whose sum is σ = 35645158080. Its totient is φ = 8482787600.

The previous prime is 18666702937. The next prime is 18666703037. The reversal of 18666702956 is 65920766681.

It is a happy 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, 137591 + ... + 237201.

It is an arithmetic number, because the mean of its divisors is an integer number (1485214920).

Almost surely, 2^18666702956 is an apocalyptic number.

It is an amenable number.

18666702956 is a deficient number, since it is larger than the sum of its proper divisors (16978455124).

18666702956 is a wasteful number, since it uses less digits than its factorization.

18666702956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103885 (or 103883 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 18666702956 in words is "eighteen billion, six hundred sixty-six million, seven hundred two thousand, nine hundred fifty-six".