18151372 has 24 divisors (see below), whose sum is σ = 32644080. Its totient is φ = 8828160.

The previous prime is 18151351. The next prime is 18151379. The reversal of 18151372 is 27315181.

It is a self number, because there is not a number n which added to its sum of digits gives 18151372.

It is not an unprimeable number, because it can be changed into a prime (18151379) 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, 23472 + ... + 24232.

It is an arithmetic number, because the mean of its divisors is an integer number (1360170).

Almost surely, 2^18151372 is an apocalyptic number.

It is an amenable number.

18151372 is a deficient number, since it is larger than the sum of its proper divisors (14492708).

18151372 is a wasteful number, since it uses less digits than its factorization.

18151372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 919 counting only the distinct ones).

The product of its digits is 1680, while the sum is 28.

The square root of 18151372 is about 4260.4427000020. The cubic root of 18151372 is about 262.8067319950.

The spelling of 18151372 in words is "eighteen million, one hundred fifty-one thousand, three hundred seventy-two".