20983164 has 24 divisors (see below), whose sum is σ = 49037520. Its totient is φ = 6983424.

The previous prime is 20983159. The next prime is 20983189. The reversal of 20983164 is 46138902.

It is a congruent number.

It is an unprimeable number.

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, 11242 + ... + 12974.

It is an arithmetic number, because the mean of its divisors is an integer number (2043230).

Almost surely, 2^20983164 is an apocalyptic number.

It is an amenable number.

20983164 is an abundant number, since it is smaller than the sum of its proper divisors (28054356).

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

20983164 is a wasteful number, since it uses less digits than its factorization.

20983164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749 (or 2747 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20983164 is about 4580.7383684293. The cubic root of 20983164 is about 275.8186689620.

The spelling of 20983164 in words is "twenty million, nine hundred eighty-three thousand, one hundred sixty-four".