18250388836 has 9 divisors (see below), whose sum is σ = 31938653299. Its totient is φ = 9125059324.

The previous prime is 18250388833. The next prime is 18250388857. The reversal of 18250388836 is 63888305281.

The square root of 18250388836 is 135094.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18250388833) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 236415 + ... + 303961.

Almost surely, 2^18250388836 is an apocalyptic number.

18250388836 is the 135094-th square number.

It is an amenable number.

18250388836 is a deficient number, since it is larger than the sum of its proper divisors (13688264463).

18250388836 is an frugal number, since it uses more digits than its factorization.

18250388836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135098 (or 67549 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 52.

The spelling of 18250388836 in words is "eighteen billion, two hundred fifty million, three hundred eighty-eight thousand, eight hundred thirty-six".