20395264 has 18 divisors (see below), whose sum is σ = 40711370. Its totient is φ = 10197504.

The previous prime is 20395231. The next prime is 20395283. The reversal of 20395264 is 46259302.

It can be written as a sum of positive squares in only one way, i.e., 17572864 + 2822400 = 4192^2 + 1680^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39579 + ... + 40090.

Almost surely, 2^20395264 is an apocalyptic number.

It is an amenable number.

20395264 is a deficient number, since it is larger than the sum of its proper divisors (20316106).

20395264 is an frugal number, since it uses more digits than its factorization.

20395264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79685 (or 79671 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 20395264 is about 4516.1116018097. Note that the first 3 decimals coincide. The cubic root of 20395264 is about 273.2182951691.

The spelling of 20395264 in words is "twenty million, three hundred ninety-five thousand, two hundred sixty-four".