18907772 has 12 divisors (see below), whose sum is σ = 35633976. Its totient is φ = 8726640.

The previous prime is 18907729. The next prime is 18907787. The reversal of 18907772 is 27770981.

It is a congruent number.

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, 181754 + ... + 181857.

It is an arithmetic number, because the mean of its divisors is an integer number (2969498).

Almost surely, 2^18907772 is an apocalyptic number.

It is an amenable number.

18907772 is a deficient number, since it is larger than the sum of its proper divisors (16726204).

18907772 is a wasteful number, since it uses less digits than its factorization.

18907772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363628 (or 363626 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 41.

The square root of 18907772 is about 4348.3067969038. The cubic root of 18907772 is about 266.4077076350.

The spelling of 18907772 in words is "eighteen million, nine hundred seven thousand, seven hundred seventy-two".