20256604001 has 2 divisors, whose sum is σ = 20256604002. Its totient is φ = 20256604000.

The previous prime is 20256603977. The next prime is 20256604021. The reversal of 20256604001 is 10040665202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20256120976 + 483025 = 142324^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 20256604001 - 2⁶ = 20256603937 is a prime.

It is not a weakly prime, because it can be changed into another prime (20256604021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10128302000 + 10128302001.

It is an arithmetic number, because the mean of its divisors is an integer number (10128302001).

Almost surely, 2^20256604001 is an apocalyptic number.

It is an amenable number.

20256604001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20256604001 is an equidigital number, since it uses as much as digits as its factorization.

20256604001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 20256604001 in words is "twenty billion, two hundred fifty-six million, six hundred four thousand, one".