20677475365 has 4 divisors (see below), whose sum is σ = 24812970444. Its totient is φ = 16541980288.

The previous prime is 20677475359. The next prime is 20677475369. The reversal of 20677475365 is 56357477602.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13334013729 + 7343461636 = 115473^2 + 85694^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20677475365 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 (20677475369) 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, 2067747532 + ... + 2067747541.

It is an arithmetic number, because the mean of its divisors is an integer number (6203242611).

Almost surely, 2^20677475365 is an apocalyptic number.

It is an amenable number.

20677475365 is a deficient number, since it is larger than the sum of its proper divisors (4135495079).

20677475365 is an equidigital number, since it uses as much as digits as its factorization.

20677475365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4135495078.

The product of its (nonzero) digits is 7408800, while the sum is 52.

The spelling of 20677475365 in words is "twenty billion, six hundred seventy-seven million, four hundred seventy-five thousand, three hundred sixty-five".