20577158607 has 4 divisors (see below), whose sum is σ = 27436211480. Its totient is φ = 13718105736.

The previous prime is 20577158599. The next prime is 20577158611. The reversal of 20577158607 is 70685177502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20577158607 - 2³ = 20577158599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20577158507) 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, 3429526432 + ... + 3429526437.

It is an arithmetic number, because the mean of its divisors is an integer number (6859052870).

Almost surely, 2^20577158607 is an apocalyptic number.

20577158607 is a deficient number, since it is larger than the sum of its proper divisors (6859052873).

20577158607 is an equidigital number, since it uses as much as digits as its factorization.

20577158607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6859052872.

The product of its (nonzero) digits is 823200, while the sum is 48.

The spelling of 20577158607 in words is "twenty billion, five hundred seventy-seven million, one hundred fifty-eight thousand, six hundred seven".