20204342131 has 2 divisors, whose sum is σ = 20204342132. Its totient is φ = 20204342130.

The previous prime is 20204342117. The next prime is 20204342161. The reversal of 20204342131 is 13124340202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20204342131 - 2³¹ = 18056858483 is a prime.

It is a super-2 number, since 2×20204342131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20204342161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10102171065 + 10102171066.

It is an arithmetic number, because the mean of its divisors is an integer number (10102171066).

Almost surely, 2^20204342131 is an apocalyptic number.

20204342131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20204342131 is an equidigital number, since it uses as much as digits as its factorization.

20204342131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20204342131 its reverse (13124340202), we get a palindrome (33328682333).

The spelling of 20204342131 in words is "twenty billion, two hundred four million, three hundred forty-two thousand, one hundred thirty-one".