18423718756 has 9 divisors (see below), whose sum is σ = 32241982899. Its totient is φ = 9211723644.

The previous prime is 18423718667. The next prime is 18423718769. The reversal of 18423718756 is 65781732481.

The square root of 18423718756 is 135734.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 237535 + ... + 305401.

Almost surely, 2^18423718756 is an apocalyptic number.

18423718756 is the 135734-th square number.

It is an amenable number.

18423718756 is a deficient number, since it is larger than the sum of its proper divisors (13818264143).

18423718756 is an frugal number, since it uses more digits than its factorization.

18423718756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135738 (or 67869 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 52.

The spelling of 18423718756 in words is "eighteen billion, four hundred twenty-three million, seven hundred eighteen thousand, seven hundred fifty-six".