18557672 has 32 divisors (see below), whose sum is σ = 40584000. Its totient is φ = 7952112.

The previous prime is 18557663. The next prime is 18557677. The reversal of 18557672 is 27675581.

It is not an unprimeable number, because it can be changed into a prime (18557677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638 + ... + 6125.

It is an arithmetic number, because the mean of its divisors is an integer number (1268250).

Almost surely, 2^18557672 is an apocalyptic number.

It is an amenable number.

18557672 is an abundant number, since it is smaller than the sum of its proper divisors (22026328).

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

18557672 is an equidigital number, since it uses as much as digits as its factorization.

18557672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6790 (or 6772 counting only the distinct ones).

The product of its digits is 117600, while the sum is 41.

The square root of 18557672 is about 4307.8616505176. The cubic root of 18557672 is about 264.7531675741.

The spelling of 18557672 in words is "eighteen million, five hundred fifty-seven thousand, six hundred seventy-two".