20577520572279 has 64 divisors (see below), whose sum is σ = 32276785981440. Its totient is φ = 11526538826880.

The previous prime is 20577520572253. The next prime is 20577520572283. The reversal of 20577520572279 is 97227502577502.

It is a happy number.

It is not a de Polignac number, because 20577520572279 - 2⁷ = 20577520572151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20577520572239) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22550352 + ... + 23445114.

It is an arithmetic number, because the mean of its divisors is an integer number (504324780960).

Almost surely, 2^{20577520572279} is an apocalyptic number.

20577520572279 is a deficient number, since it is larger than the sum of its proper divisors (11699265409161).

20577520572279 is a wasteful number, since it uses less digits than its factorization.

20577520572279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895692.

The product of its (nonzero) digits is 43218000, while the sum is 60.

The spelling of 20577520572279 in words is "twenty trillion, five hundred seventy-seven billion, five hundred twenty million, five hundred seventy-two thousand, two hundred seventy-nine".