18964044 has 120 divisors (see below), whose sum is σ = 57446928. Its totient is φ = 5391360.

The previous prime is 18964039. The next prime is 18964067. The reversal of 18964044 is 44046981.

It is a happy number.

18964044 is a `hidden beast` number, since 1 + 8 + 9 + 640 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 in 39 ways as a sum of consecutive naturals, for example, 60432 + ... + 60744.

Almost surely, 2^18964044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18964044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28723464).

18964044 is an abundant number, since it is smaller than the sum of its proper divisors (38482884).

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

18964044 is a wasteful number, since it uses less digits than its factorization.

18964044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 18964044 is about 4354.7725543362. The cubic root of 18964044 is about 266.6717339315.

The spelling of 18964044 in words is "eighteen million, nine hundred sixty-four thousand, forty-four".