20577569259 has 32 divisors (see below), whose sum is σ = 31149368320. Its totient is φ = 11978523648.

The previous prime is 20577569239. The next prime is 20577569269. The reversal of 20577569259 is 95296577502.

It is a happy number.

It is not a de Polignac number, because 20577569259 - 2¹² = 20577565163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20577569199 and 20577569208.

It is not an unprimeable number, because it can be changed into a prime (20577569239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 478062 + ... + 519324.

It is an arithmetic number, because the mean of its divisors is an integer number (973417760).

Almost surely, 2^20577569259 is an apocalyptic number.

20577569259 is a deficient number, since it is larger than the sum of its proper divisors (10571799061).

20577569259 is a wasteful number, since it uses less digits than its factorization.

20577569259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41971.

The product of its (nonzero) digits is 11907000, while the sum is 57.

The spelling of 20577569259 in words is "twenty billion, five hundred seventy-seven million, five hundred sixty-nine thousand, two hundred fifty-nine".