20264975 has 12 divisors (see below), whose sum is σ = 25287816. Its totient is φ = 16109280.

The previous prime is 20264929. The next prime is 20264977. The reversal of 20264975 is 57946202.

It is not a de Polignac number, because 20264975 - 2⁸ = 20264719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20264977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1589 + ... + 6561.

It is an arithmetic number, because the mean of its divisors is an integer number (2107318).

Almost surely, 2^20264975 is an apocalyptic number.

20264975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20264975 is a deficient number, since it is larger than the sum of its proper divisors (5022841).

20264975 is a wasteful number, since it uses less digits than its factorization.

20264975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5146 (or 5141 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 20264975 is about 4501.6635813886. The cubic root of 20264975 is about 272.6352609643.

The spelling of 20264975 in words is "twenty million, two hundred sixty-four thousand, nine hundred seventy-five".