18464964 has 72 divisors (see below), whose sum is σ = 51787008. Its totient is φ = 5100480.

The previous prime is 18464947. The next prime is 18464969. The reversal of 18464964 is 46946481.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (18464969) 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, 17722 + ... + 18734.

It is an arithmetic number, because the mean of its divisors is an integer number (719264).

Almost surely, 2^18464964 is an apocalyptic number.

18464964 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18464964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25893504).

18464964 is an abundant number, since it is smaller than the sum of its proper divisors (33322044).

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

18464964 is a wasteful number, since it uses less digits than its factorization.

18464964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065 (or 1056 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 18464964 is about 4297.0878510917. The cubic root of 18464964 is about 264.3115582505.

The spelling of 18464964 in words is "eighteen million, four hundred sixty-four thousand, nine hundred sixty-four".