18764464 has 40 divisors (see below), whose sum is σ = 38836800. Its totient is φ = 8752128.

The previous prime is 18764461. The next prime is 18764467. The reversal of 18764464 is 46446781.

It is an interprime number because it is at equal distance from previous prime (18764461) and next prime (18764467).

It is not an unprimeable number, because it can be changed into a prime (18764461) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 40297 + ... + 40759.

It is an arithmetic number, because the mean of its divisors is an integer number (970920).

Almost surely, 2^18764464 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 18764464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19418400).

18764464 is an abundant number, since it is smaller than the sum of its proper divisors (20072336).

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

18764464 is a wasteful number, since it uses less digits than its factorization.

18764464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 631 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 18764464 is about 4331.7968558094. The cubic root of 18764464 is about 265.7329371532.

The spelling of 18764464 in words is "eighteen million, seven hundred sixty-four thousand, four hundred sixty-four".