18631268428688 has 80 divisors (see below), whose sum is σ = 36699673570560. Its totient is φ = 9160874308608.

The previous prime is 18631268428637. The next prime is 18631268428691. The reversal of 18631268428688 is 88682486213681.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2121283145 + ... + 2121291927.

It is an arithmetic number, because the mean of its divisors is an integer number (458745919632).

Almost surely, 2^{18631268428688} is an apocalyptic number.

It is an amenable number.

18631268428688 is a deficient number, since it is larger than the sum of its proper divisors (18068405141872).

18631268428688 is a wasteful number, since it uses less digits than its factorization.

18631268428688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12024 (or 12018 counting only the distinct ones).

The product of its digits is 339738624, while the sum is 71.

The spelling of 18631268428688 in words is "eighteen trillion, six hundred thirty-one billion, two hundred sixty-eight million, four hundred twenty-eight thousand, six hundred eighty-eight".