18272052 has 18 divisors (see below), whose sum is σ = 46187778. Its totient is φ = 6090672.

The previous prime is 18272041. The next prime is 18272071. The reversal of 18272052 is 25027281.

It can be written as a sum of positive squares in only one way, i.e., 17338896 + 933156 = 4164^2 + 966^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 253743 + ... + 253814.

Almost surely, 2^18272052 is an apocalyptic number.

18272052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18272052 is an abundant number, since it is smaller than the sum of its proper divisors (27915726).

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

18272052 is a wasteful number, since it uses less digits than its factorization.

18272052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507567 (or 507562 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 18272052 is about 4274.5820848359. The cubic root of 18272052 is about 263.3878724117.

The spelling of 18272052 in words is "eighteen million, two hundred seventy-two thousand, fifty-two".