18356572 has 12 divisors (see below), whose sum is σ = 34595176. Its totient is φ = 8472240.

The previous prime is 18356567. The next prime is 18356579. The reversal of 18356572 is 27565381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18356579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176454 + ... + 176557.

Almost surely, 2^18356572 is an apocalyptic number.

It is an amenable number.

18356572 is a deficient number, since it is larger than the sum of its proper divisors (16238604).

18356572 is a wasteful number, since it uses less digits than its factorization.

18356572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353028 (or 353026 counting only the distinct ones).

The product of its digits is 50400, while the sum is 37.

The square root of 18356572 is about 4284.4570251083. The cubic root of 18356572 is about 263.7933606451.

It can be divided in two parts, 18 and 356572, that added together give a triangular number (356590 = T₈₄₄).

The spelling of 18356572 in words is "eighteen million, three hundred fifty-six thousand, five hundred seventy-two".