20677169877 has 16 divisors (see below), whose sum is σ = 33931766400. Its totient is φ = 10906638912.

The previous prime is 20677169869. The next prime is 20677169941. The reversal of 20677169877 is 77896177602.

It is not a de Polignac number, because 20677169877 - 2³ = 20677169869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20677169877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20677169827) 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, 37870002 + ... + 37870547.

It is an arithmetic number, because the mean of its divisors is an integer number (2120735400).

Almost surely, 2^20677169877 is an apocalyptic number.

It is an amenable number.

20677169877 is a deficient number, since it is larger than the sum of its proper divisors (13254596523).

20677169877 is a wasteful number, since it uses less digits than its factorization.

20677169877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75740572.

The product of its (nonzero) digits is 12446784, while the sum is 60.

The spelling of 20677169877 in words is "twenty billion, six hundred seventy-seven million, one hundred sixty-nine thousand, eight hundred seventy-seven".