18390552 has 16 divisors (see below), whose sum is σ = 45976440. Its totient is φ = 6130176.

The previous prime is 18390551. The next prime is 18390557. The reversal of 18390552 is 25509381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18390551) 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, 383113 + ... + 383160.

Almost surely, 2^18390552 is an apocalyptic number.

18390552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18390552 is an abundant number, since it is smaller than the sum of its proper divisors (27585888).

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

18390552 is a wasteful number, since it uses less digits than its factorization.

18390552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766282 (or 766278 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 18390552 is about 4288.4206883187. The cubic root of 18390552 is about 263.9560303264.

The spelling of 18390552 in words is "eighteen million, three hundred ninety thousand, five hundred fifty-two".