18855272 has 16 divisors (see below), whose sum is σ = 36106560. Its totient is φ = 9226864.

The previous prime is 18855269. The next prime is 18855299. The reversal of 18855272 is 27255881.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24698 + ... + 25449.

It is an arithmetic number, because the mean of its divisors is an integer number (2256660).

Almost surely, 2^18855272 is an apocalyptic number.

It is an amenable number.

18855272 is a deficient number, since it is larger than the sum of its proper divisors (17251288).

18855272 is a wasteful number, since it uses less digits than its factorization.

18855272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50200 (or 50196 counting only the distinct ones).

The product of its digits is 44800, while the sum is 38.

The square root of 18855272 is about 4342.2657680064. The cubic root of 18855272 is about 266.1609066598.

The spelling of 18855272 in words is "eighteen million, eight hundred fifty-five thousand, two hundred seventy-two".