20512602377 has 2 divisors, whose sum is σ = 20512602378. Its totient is φ = 20512602376.

The previous prime is 20512602361. The next prime is 20512602379. The reversal of 20512602377 is 77320621502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16055170681 + 4457431696 = 126709^2 + 66764^2 .

It is a cyclic number.

It is not a de Polignac number, because 20512602377 - 2⁴ = 20512602361 is a prime.

Together with 20512602379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20512602379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10256301188 + 10256301189.

It is an arithmetic number, because the mean of its divisors is an integer number (10256301189).

Almost surely, 2^20512602377 is an apocalyptic number.

It is an amenable number.

20512602377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20512602377 is an equidigital number, since it uses as much as digits as its factorization.

20512602377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 35.

The spelling of 20512602377 in words is "twenty billion, five hundred twelve million, six hundred two thousand, three hundred seventy-seven".