18920572 has 12 divisors (see below), whose sum is σ = 36121176. Its totient is φ = 8600240.

The previous prime is 18920569. The next prime is 18920621. The reversal of 18920572 is 27502981.

It is a congruent number.

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, 214963 + ... + 215050.

It is an arithmetic number, because the mean of its divisors is an integer number (3010098).

Almost surely, 2^18920572 is an apocalyptic number.

It is an amenable number.

18920572 is a deficient number, since it is larger than the sum of its proper divisors (17200604).

18920572 is a wasteful number, since it uses less digits than its factorization.

18920572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430028 (or 430026 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 18920572 is about 4349.7783851594. The cubic root of 18920572 is about 266.4678107759.

The spelling of 18920572 in words is "eighteen million, nine hundred twenty thousand, five hundred seventy-two".