18972374 has 32 divisors (see below), whose sum is σ = 32503680. Its totient is φ = 8249472.

The previous prime is 18972367. The next prime is 18972377. The reversal of 18972374 is 47327981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18972377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27437 + ... + 28119.

It is an arithmetic number, because the mean of its divisors is an integer number (1015740).

Almost surely, 2^18972374 is an apocalyptic number.

18972374 is a deficient number, since it is larger than the sum of its proper divisors (13531306).

18972374 is a wasteful number, since it uses less digits than its factorization.

18972374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

The product of its digits is 84672, while the sum is 41.

The square root of 18972374 is about 4355.7288712683. The cubic root of 18972374 is about 266.7107736070.

The spelling of 18972374 in words is "eighteen million, nine hundred seventy-two thousand, three hundred seventy-four".