20368887077 has 12 divisors (see below), whose sum is σ = 25848458496. Its totient is φ = 15871859640.

The previous prime is 20368887061. The next prime is 20368887079. The reversal of 20368887077 is 77078886302.

It is not a de Polignac number, because 20368887077 - 2⁴ = 20368887061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20368887079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18894533 + ... + 18895610.

It is an arithmetic number, because the mean of its divisors is an integer number (2154038208).

Almost surely, 2^20368887077 is an apocalyptic number.

It is an amenable number.

20368887077 is a deficient number, since it is larger than the sum of its proper divisors (5479571419).

20368887077 is a wasteful number, since it uses less digits than its factorization.

20368887077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37790168 (or 37790161 counting only the distinct ones).

The product of its (nonzero) digits is 6322176, while the sum is 56.

The spelling of 20368887077 in words is "twenty billion, three hundred sixty-eight million, eight hundred eighty-seven thousand, seventy-seven".