18057212 has 24 divisors (see below), whose sum is σ = 32551680. Its totient is φ = 8760240.

The previous prime is 18057203. The next prime is 18057223. The reversal of 18057212 is 21275081.

It is a congruent number.

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, 25787 + ... + 26477.

It is an arithmetic number, because the mean of its divisors is an integer number (1356320).

Almost surely, 2^18057212 is an apocalyptic number.

It is an amenable number.

18057212 is a deficient number, since it is larger than the sum of its proper divisors (14494468).

18057212 is a wasteful number, since it uses less digits than its factorization.

18057212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 18057212 is about 4249.3778368133. The cubic root of 18057212 is about 262.3515084583.

The spelling of 18057212 in words is "eighteen million, fifty-seven thousand, two hundred twelve".