18914972 has 6 divisors (see below), whose sum is σ = 33101208. Its totient is φ = 9457484.

The previous prime is 18914963. The next prime is 18915007. The reversal of 18914972 is 27941981.

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 as a sum of consecutive naturals, namely, 2364368 + ... + 2364375.

It is an arithmetic number, because the mean of its divisors is an integer number (5516868).

Almost surely, 2^18914972 is an apocalyptic number.

It is an amenable number.

18914972 is a deficient number, since it is larger than the sum of its proper divisors (14186236).

18914972 is a wasteful number, since it uses less digits than its factorization.

18914972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4728747 (or 4728745 counting only the distinct ones).

The product of its digits is 36288, while the sum is 41.

The square root of 18914972 is about 4349.1346265665. The cubic root of 18914972 is about 266.4415189882.

The spelling of 18914972 in words is "eighteen million, nine hundred fourteen thousand, nine hundred seventy-two".