18252972 has 24 divisors (see below), whose sum is σ = 47322800. Its totient is φ = 6084288.

The previous prime is 18252959. The next prime is 18252973. The reversal of 18252972 is 27925281.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18252973) 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, 84397 + ... + 84612.

Almost surely, 2^18252972 is an apocalyptic number.

18252972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18252972 is an abundant number, since it is smaller than the sum of its proper divisors (29069828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18252972 is a wasteful number, since it uses less digits than its factorization.

18252972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169022 (or 169014 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 18252972 is about 4272.3497047878. The cubic root of 18252972 is about 263.2961623903.

It can be divided in two parts, 18252 and 972, that multiplied together give a square (17740944 = 4212²).

The spelling of 18252972 in words is "eighteen million, two hundred fifty-two thousand, nine hundred seventy-two".