20839264 has 24 divisors (see below), whose sum is σ = 41192928. Its totient is φ = 10377600.

The previous prime is 20839249. The next prime is 20839267. The reversal of 20839264 is 46293802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20839267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7689 + ... + 10039.

It is an arithmetic number, because the mean of its divisors is an integer number (1716372).

Almost surely, 2^20839264 is an apocalyptic number.

It is an amenable number.

20839264 is a deficient number, since it is larger than the sum of its proper divisors (20353664).

20839264 is a wasteful number, since it uses less digits than its factorization.

20839264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2638 (or 2630 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 20839264 is about 4565.0042716300. The cubic root of 20839264 is about 275.1867117705.

The spelling of 20839264 in words is "twenty million, eight hundred thirty-nine thousand, two hundred sixty-four".