20569395259 has 16 divisors (see below), whose sum is σ = 25972904448. Its totient is φ = 15872326272.

The previous prime is 20569395257. The next prime is 20569395263. The reversal of 20569395259 is 95259396502.

It is a cyclic number.

It is not a de Polignac number, because 20569395259 - 2¹ = 20569395257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20569395257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3754917 + ... + 3760390.

It is an arithmetic number, because the mean of its divisors is an integer number (1623306528).

Almost surely, 2^20569395259 is an apocalyptic number.

20569395259 is a deficient number, since it is larger than the sum of its proper divisors (5403509189).

20569395259 is a wasteful number, since it uses less digits than its factorization.

20569395259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7515354.

The product of its (nonzero) digits is 6561000, while the sum is 55.

The spelling of 20569395259 in words is "twenty billion, five hundred sixty-nine million, three hundred ninety-five thousand, two hundred fifty-nine".