18805972 has 24 divisors (see below), whose sum is σ = 35013440. Its totient is φ = 8812800.

The previous prime is 18805951. The next prime is 18806077. The reversal of 18805972 is 27950881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6097 + ... + 8647.

Almost surely, 2^18805972 is an apocalyptic number.

It is an amenable number.

18805972 is a deficient number, since it is larger than the sum of its proper divisors (16207468).

18805972 is a wasteful number, since it uses less digits than its factorization.

18805972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2671 (or 2669 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 18805972 is about 4336.5852926006. The cubic root of 18805972 is about 265.9287313544.

The spelling of 18805972 in words is "eighteen million, eight hundred five thousand, nine hundred seventy-two".