20596321191977 has 2 divisors, whose sum is σ = 20596321191978. Its totient is φ = 20596321191976.

The previous prime is 20596321191967. The next prime is 20596321192063. The reversal of 20596321191977 is 77919112369502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20519550082201 + 76771109776 = 4529851^2 + 277076^2 .

It is a cyclic number.

It is not a de Polignac number, because 20596321191977 - 2¹² = 20596321187881 is a prime.

It is not a weakly prime, because it can be changed into another prime (20596321191937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10298160595988 + 10298160595989.

It is an arithmetic number, because the mean of its divisors is an integer number (10298160595989).

Almost surely, 2^{20596321191977} is an apocalyptic number.

It is an amenable number.

20596321191977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20596321191977 is an equidigital number, since it uses as much as digits as its factorization.

20596321191977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12859560, while the sum is 62.

The spelling of 20596321191977 in words is "twenty trillion, five hundred ninety-six billion, three hundred twenty-one million, one hundred ninety-one thousand, nine hundred seventy-seven".