18051272 has 32 divisors (see below), whose sum is σ = 34636800. Its totient is φ = 8817984.

The previous prime is 18051233. The next prime is 18051277. The reversal of 18051272 is 27215081.

It is not an unprimeable number, because it can be changed into a prime (18051277) 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, 110663 + ... + 110825.

It is an arithmetic number, because the mean of its divisors is an integer number (1082400).

Almost surely, 2^18051272 is an apocalyptic number.

It is an amenable number.

18051272 is a deficient number, since it is larger than the sum of its proper divisors (16585528).

18051272 is a wasteful number, since it uses less digits than its factorization.

18051272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 401 counting only the distinct ones).

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

The square root of 18051272 is about 4248.6788534790. The cubic root of 18051272 is about 262.3227380724.

The spelling of 18051272 in words is "eighteen million, fifty-one thousand, two hundred seventy-two".