18806972 has 6 divisors (see below), whose sum is σ = 32912208. Its totient is φ = 9403484.

The previous prime is 18806951. The next prime is 18807001. The reversal of 18806972 is 27960881.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2350868 + ... + 2350875.

It is an arithmetic number, because the mean of its divisors is an integer number (5485368).

Almost surely, 2^18806972 is an apocalyptic number.

It is an amenable number.

18806972 is a deficient number, since it is larger than the sum of its proper divisors (14105236).

18806972 is a wasteful number, since it uses less digits than its factorization.

18806972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4701747 (or 4701745 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 18806972 is about 4336.7005891576. The cubic root of 18806972 is about 265.9334448220.

The spelling of 18806972 in words is "eighteen million, eight hundred six thousand, nine hundred seventy-two".