18361876036 has 27 divisors (see below), whose sum is σ = 37383395679. Its totient is φ = 7868562408.

The previous prime is 18361876019. The next prime is 18361876079. The reversal of 18361876036 is 63067816381.

The square root of 18361876036 is 135506.

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

It is a super-2 number, since 2×18361876036² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1892245 + ... + 1901923.

Almost surely, 2^18361876036 is an apocalyptic number.

18361876036 is the 135506-th square number.

It is an amenable number.

18361876036 is an abundant number, since it is smaller than the sum of its proper divisors (19021519643).

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

18361876036 is an frugal number, since it uses more digits than its factorization.

18361876036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19376 (or 9688 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

Multiplying 18361876036 by its sum of digits (49), we get a square (899731925764 = 948542²).

18361876036 divided by its sum of digits (49) gives a square (374732164 = 19358²).

The spelling of 18361876036 in words is "eighteen billion, three hundred sixty-one million, eight hundred seventy-six thousand, thirty-six".