18900974 has 16 divisors (see below), whose sum is σ = 30100896. Its totient is φ = 8870400.

The previous prime is 18900971. The next prime is 18900983. The reversal of 18900974 is 47900981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18900971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21014 + ... + 21894.

It is an arithmetic number, because the mean of its divisors is an integer number (1881306).

Almost surely, 2^18900974 is an apocalyptic number.

18900974 is a deficient number, since it is larger than the sum of its proper divisors (11199922).

18900974 is a wasteful number, since it uses less digits than its factorization.

18900974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 18900974 is about 4347.5250430561. The cubic root of 18900974 is about 266.3757762034.

The spelling of 18900974 in words is "eighteen million, nine hundred thousand, nine hundred seventy-four".