18957231232 has 32 divisors (see below), whose sum is σ = 37772578800. Its totient is φ = 9477054720.

The previous prime is 18957231211. The next prime is 18957231239. The reversal of 18957231232 is 23213275981.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (18957231239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1454119 + ... + 1467097.

Almost surely, 2^18957231232 is an apocalyptic number.

It is an amenable number.

18957231232 is a deficient number, since it is larger than the sum of its proper divisors (18815347568).

18957231232 is a wasteful number, since it uses less digits than its factorization.

18957231232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24404 (or 24392 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The spelling of 18957231232 in words is "eighteen billion, nine hundred fifty-seven million, two hundred thirty-one thousand, two hundred thirty-two".