20357600677 has 2 divisors, whose sum is σ = 20357600678. Its totient is φ = 20357600676.

The previous prime is 20357600671. The next prime is 20357600687. The reversal of 20357600677 is 77600675302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20095614081 + 261986596 = 141759^2 + 16186^2 .

It is a cyclic number.

It is not a de Polignac number, because 20357600677 - 2¹¹ = 20357598629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20357600671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10178800338 + 10178800339.

It is an arithmetic number, because the mean of its divisors is an integer number (10178800339).

Almost surely, 2^20357600677 is an apocalyptic number.

It is an amenable number.

20357600677 is a deficient number, since it is larger than the sum of its proper divisors (1).

20357600677 is an equidigital number, since it uses as much as digits as its factorization.

20357600677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 370440, while the sum is 43.

The spelling of 20357600677 in words is "twenty billion, three hundred fifty-seven million, six hundred thousand, six hundred seventy-seven".