18887000956 has 12 divisors (see below), whose sum is σ = 33145886592. Its totient is φ = 9416747648.

The previous prime is 18887000947. The next prime is 18887000959. The reversal of 18887000956 is 65900078881.

It is a super-2 number, since 2×18887000956² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18887000959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6686620 + ... + 6689443.

It is an arithmetic number, because the mean of its divisors is an integer number (2762157216).

Almost surely, 2^18887000956 is an apocalyptic number.

It is an amenable number.

18887000956 is a deficient number, since it is larger than the sum of its proper divisors (14258885636).

18887000956 is a wasteful number, since it uses less digits than its factorization.

18887000956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13376420 (or 13376418 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 52.

The spelling of 18887000956 in words is "eighteen billion, eight hundred eighty-seven million, nine hundred fifty-six", and thus it is an aban number.