20502775001 has 2 divisors, whose sum is σ = 20502775002. Its totient is φ = 20502775000.

The previous prime is 20502774997. The next prime is 20502775019. The reversal of 20502775001 is 10057720502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11083878400 + 9418896601 = 105280^2 + 97051^2 .

It is a cyclic number.

It is not a de Polignac number, because 20502775001 - 2² = 20502774997 is a prime.

It is not a weakly prime, because it can be changed into another prime (20502775091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251387500 + 10251387501.

It is an arithmetic number, because the mean of its divisors is an integer number (10251387501).

Almost surely, 2^20502775001 is an apocalyptic number.

It is an amenable number.

20502775001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502775001 is an equidigital number, since it uses as much as digits as its factorization.

20502775001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4900, while the sum is 29.

The spelling of 20502775001 in words is "twenty billion, five hundred two million, seven hundred seventy-five thousand, one".