18539212 has 24 divisors (see below), whose sum is σ = 34574400. Its totient is φ = 8672976.

The previous prime is 18539189. The next prime is 18539233. The reversal of 18539212 is 21293581.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4839 + ... + 7777.

It is an arithmetic number, because the mean of its divisors is an integer number (1440600).

Almost surely, 2^18539212 is an apocalyptic number.

It is an amenable number.

18539212 is a deficient number, since it is larger than the sum of its proper divisors (16035188).

18539212 is a wasteful number, since it uses less digits than its factorization.

18539212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3045 (or 3043 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 18539212 is about 4305.7185230807. The cubic root of 18539212 is about 264.6653518734.

The spelling of 18539212 in words is "eighteen million, five hundred thirty-nine thousand, two hundred twelve".