20502198793 has 2 divisors, whose sum is σ = 20502198794. Its totient is φ = 20502198792.

The previous prime is 20502198751. The next prime is 20502198811. The reversal of 20502198793 is 39789120502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16427036224 + 4075162569 = 128168^2 + 63837^2 .

It is a cyclic number.

It is not a de Polignac number, because 20502198793 - 2²⁹ = 19965327881 is a prime.

It is not a weakly prime, because it can be changed into another prime (20502198593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251099396 + 10251099397.

It is an arithmetic number, because the mean of its divisors is an integer number (10251099397).

Almost surely, 2^20502198793 is an apocalyptic number.

It is an amenable number.

20502198793 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502198793 is an equidigital number, since it uses as much as digits as its factorization.

20502198793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 20502198793 in words is "twenty billion, five hundred two million, one hundred ninety-eight thousand, seven hundred ninety-three".