20502522331 has 2 divisors, whose sum is σ = 20502522332. Its totient is φ = 20502522330.

The previous prime is 20502522319. The next prime is 20502522373. The reversal of 20502522331 is 13322520502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20502522331 - 2¹³ = 20502514139 is a prime.

It is a super-2 number, since 2×20502522331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20502522296 and 20502522305.

It is not a weakly prime, because it can be changed into another prime (20502522311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251261165 + 10251261166.

It is an arithmetic number, because the mean of its divisors is an integer number (10251261166).

Almost surely, 2^20502522331 is an apocalyptic number.

20502522331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502522331 is an equidigital number, since it uses as much as digits as its factorization.

20502522331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 25.

The spelling of 20502522331 in words is "twenty billion, five hundred two million, five hundred twenty-two thousand, three hundred thirty-one".