20251164 has 24 divisors (see below), whose sum is σ = 48882960. Its totient is φ = 6517504.

The previous prime is 20251129. The next prime is 20251183. The reversal of 20251164 is 46115202.

It is a self number, because there is not a number n which added to its sum of digits gives 20251164.

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, 28749 + ... + 29444.

It is an arithmetic number, because the mean of its divisors is an integer number (2036790).

Almost surely, 2^20251164 is an apocalyptic number.

It is an amenable number.

20251164 is an abundant number, since it is smaller than the sum of its proper divisors (28631796).

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

20251164 is a wasteful number, since it uses less digits than its factorization.

20251164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58229 (or 58227 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20251164 is about 4500.1293314748. The cubic root of 20251164 is about 272.5733113639.

Adding to 20251164 its reverse (46115202), we get a palindrome (66366366).

The spelling of 20251164 in words is "twenty million, two hundred fifty-one thousand, one hundred sixty-four".