18137072 has 20 divisors (see below), whose sum is σ = 35738040. Its totient is φ = 8914368.

The previous prime is 18137051. The next prime is 18137083. The reversal of 18137072 is 27073181.

It is a congruent 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, 8663 + ... + 10550.

It is an arithmetic number, because the mean of its divisors is an integer number (1786902).

Almost surely, 2^18137072 is an apocalyptic number.

It is an amenable number.

18137072 is a deficient number, since it is larger than the sum of its proper divisors (17600968).

18137072 is a wasteful number, since it uses less digits than its factorization.

18137072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19280 (or 19274 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 18137072 is about 4258.7641399824. The cubic root of 18137072 is about 262.7376991305.

The spelling of 18137072 in words is "eighteen million, one hundred thirty-seven thousand, seventy-two".