18157436268984 has 80 divisors (see below), whose sum is σ = 51181568255400. Its totient is φ = 6013927902528.

The previous prime is 18157436268943. The next prime is 18157436268991. The reversal of 18157436268984 is 48986263475181.

18157436268984 is a `hidden beast` number, since 1 + 8 + 1 + 57 + 436 + 2 + 68 + 9 + 84 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 89136274 + ... + 89339745.

Almost surely, 2^{18157436268984} is an apocalyptic number.

It is an amenable number.

18157436268984 is an abundant number, since it is smaller than the sum of its proper divisors (33024131986416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18157436268984 is a wasteful number, since it uses less digits than its factorization.

18157436268984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178476194 (or 178476181 counting only the distinct ones).

The product of its digits is 557383680, while the sum is 72.

The spelling of 18157436268984 in words is "eighteen trillion, one hundred fifty-seven billion, four hundred thirty-six million, two hundred sixty-eight thousand, nine hundred eighty-four".