20164080 has 40 divisors (see below), whose sum is σ = 62509392. Its totient is φ = 5377024.

The previous prime is 20164063. The next prime is 20164093. The reversal of 20164080 is 8046102.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41769 + ... + 42248.

Almost surely, 2^20164080 is an apocalyptic number.

20164080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20164080 is an abundant number, since it is smaller than the sum of its proper divisors (42345312).

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

20164080 is a wasteful number, since it uses less digits than its factorization.

20164080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84033 (or 84027 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20164080 is about 4490.4431852547. The cubic root of 20164080 is about 272.1820436483.

The spelling of 20164080 in words is "twenty million, one hundred sixty-four thousand, eighty".