20568339 has 24 divisors (see below), whose sum is σ = 32555952. Its totient is φ = 12409920.

The previous prime is 20568329. The next prime is 20568343. The reversal of 20568339 is 93386502.

It is not a de Polignac number, because 20568339 - 2⁴ = 20568323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20568329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36649 + ... + 37205.

It is an arithmetic number, because the mean of its divisors is an integer number (1356498).

Almost surely, 2^20568339 is an apocalyptic number.

20568339 is a deficient number, since it is larger than the sum of its proper divisors (11987613).

20568339 is a wasteful number, since it uses less digits than its factorization.

20568339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 20568339 is about 4535.2330700858. The cubic root of 20568339 is about 273.9889662916.

The spelling of 20568339 in words is "twenty million, five hundred sixty-eight thousand, three hundred thirty-nine".