18964782 has 48 divisors (see below), whose sum is σ = 43467840. Its totient is φ = 5966016.

The previous prime is 18964723. The next prime is 18964789. The reversal of 18964782 is 28746981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18964789) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24148 + ... + 24920.

It is an arithmetic number, because the mean of its divisors is an integer number (905580).

Almost surely, 2^18964782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18964782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21733920).

18964782 is an abundant number, since it is smaller than the sum of its proper divisors (24503058).

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

18964782 is a wasteful number, since it uses less digits than its factorization.

18964782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857 (or 854 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 18964782 is about 4354.8572881324. The cubic root of 18964782 is about 266.6751931301.

The spelling of 18964782 in words is "eighteen million, nine hundred sixty-four thousand, seven hundred eighty-two".