18964374 has 96 divisors (see below), whose sum is σ = 48045312. Its totient is φ = 4910400.

The previous prime is 18964369. The next prime is 18964399. The reversal of 18964374 is 47346981.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 611739 + ... + 611769.

It is an arithmetic number, because the mean of its divisors is an integer number (500472).

Almost surely, 2^18964374 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18964374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24022656).

18964374 is an abundant number, since it is smaller than the sum of its proper divisors (29080938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18964374 is a wasteful number, since it uses less digits than its factorization.

18964374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114 (or 83 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 18964374 is about 4354.8104436359. The cubic root of 18964374 is about 266.6732807387.

The spelling of 18964374 in words is "eighteen million, nine hundred sixty-four thousand, three hundred seventy-four".