20599315889 has 2 divisors, whose sum is σ = 20599315890. Its totient is φ = 20599315888.

The previous prime is 20599315859. The next prime is 20599315909. The reversal of 20599315889 is 98851399502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19824640000 + 774675889 = 140800^2 + 27833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20599315889 is a prime.

It is not a weakly prime, because it can be changed into another prime (20599315819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10299657944 + 10299657945.

It is an arithmetic number, because the mean of its divisors is an integer number (10299657945).

Almost surely, 2^20599315889 is an apocalyptic number.

It is an amenable number.

20599315889 is a deficient number, since it is larger than the sum of its proper divisors (1).

20599315889 is an equidigital number, since it uses as much as digits as its factorization.

20599315889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6998400, while the sum is 59.

The spelling of 20599315889 in words is "twenty billion, five hundred ninety-nine million, three hundred fifteen thousand, eight hundred eighty-nine".