18205772 has 12 divisors (see below), whose sum is σ = 34310976. Its totient is φ = 8402640.

The previous prime is 18205753. The next prime is 18205829. The reversal of 18205772 is 27750281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175004 + ... + 175107.

It is an arithmetic number, because the mean of its divisors is an integer number (2859248).

Almost surely, 2^18205772 is an apocalyptic number.

It is an amenable number.

18205772 is a deficient number, since it is larger than the sum of its proper divisors (16105204).

18205772 is a wasteful number, since it uses less digits than its factorization.

18205772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350128 (or 350126 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 18205772 is about 4266.8222367472. The cubic root of 18205772 is about 263.0690157032.

The spelling of 18205772 in words is "eighteen million, two hundred five thousand, seven hundred seventy-two".