20953598401 has 2 divisors, whose sum is σ = 20953598402. Its totient is φ = 20953598400.

The previous prime is 20953598377. The next prime is 20953598429. The reversal of 20953598401 is 10489535902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11204010801 + 9749587600 = 105849^2 + 98740^2 .

It is a cyclic number.

It is not a de Polignac number, because 20953598401 - 2²³ = 20945209793 is a prime.

It is not a weakly prime, because it can be changed into another prime (20953598801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10476799200 + 10476799201.

It is an arithmetic number, because the mean of its divisors is an integer number (10476799201).

Almost surely, 2^20953598401 is an apocalyptic number.

It is an amenable number.

20953598401 is a deficient number, since it is larger than the sum of its proper divisors (1).

20953598401 is an equidigital number, since it uses as much as digits as its factorization.

20953598401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 20953598401 in words is "twenty billion, nine hundred fifty-three million, five hundred ninety-eight thousand, four hundred one".