18263972 has 12 divisors (see below), whose sum is σ = 32004336. Its totient is φ = 9119880.

The previous prime is 18263963. The next prime is 18263989. The reversal of 18263972 is 27936281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947 + ... + 6117.

It is an arithmetic number, because the mean of its divisors is an integer number (2667028).

Almost surely, 2^18263972 is an apocalyptic number.

It is an amenable number.

18263972 is a deficient number, since it is larger than the sum of its proper divisors (13740364).

18263972 is a wasteful number, since it uses less digits than its factorization.

18263972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6058 (or 6056 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 18263972 is about 4273.6368586954. The cubic root of 18263972 is about 263.3490428414.

The spelling of 18263972 in words is "eighteen million, two hundred sixty-three thousand, nine hundred seventy-two".