20164464 has 50 divisors (see below), whose sum is σ = 58365560. Its totient is φ = 6721056.

The previous prime is 20164451. The next prime is 20164481. The reversal of 20164464 is 46446102.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6484 + ... + 9075.

Almost surely, 2^20164464 is an apocalyptic number.

20164464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20164464 is an abundant number, since it is smaller than the sum of its proper divisors (38201096).

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

20164464 is a wasteful number, since it uses less digits than its factorization.

20164464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15579 (or 15564 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 20164464 is about 4490.4859425234. The cubic root of 20164464 is about 272.1837714276.

The spelling of 20164464 in words is "twenty million, one hundred sixty-four thousand, four hundred sixty-four".