18900772 has 12 divisors (see below), whose sum is σ = 36083376. Its totient is φ = 8591240.

The previous prime is 18900737. The next prime is 18900781. The reversal of 18900772 is 27700981.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214738 + ... + 214825.

It is an arithmetic number, because the mean of its divisors is an integer number (3006948).

Almost surely, 2^18900772 is an apocalyptic number.

It is an amenable number.

18900772 is a deficient number, since it is larger than the sum of its proper divisors (17182604).

18900772 is a wasteful number, since it uses less digits than its factorization.

18900772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429578 (or 429576 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 34.

The square root of 18900772 is about 4347.5018113855. The cubic root of 18900772 is about 266.3748272559.

The spelling of 18900772 in words is "eighteen million, nine hundred thousand, seven hundred seventy-two".