20342400931 has 2 divisors, whose sum is σ = 20342400932. Its totient is φ = 20342400930.

The previous prime is 20342400917. The next prime is 20342400941. The reversal of 20342400931 is 13900424302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20342400931 - 2⁷ = 20342400803 is a prime.

It is a super-2 number, since 2×20342400931² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20342400931.

It is not a weakly prime, because it can be changed into another prime (20342400941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171200465 + 10171200466.

It is an arithmetic number, because the mean of its divisors is an integer number (10171200466).

Almost surely, 2^20342400931 is an apocalyptic number.

20342400931 is a deficient number, since it is larger than the sum of its proper divisors (1).

20342400931 is an equidigital number, since it uses as much as digits as its factorization.

20342400931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 20342400931 in words is "twenty billion, three hundred forty-two million, four hundred thousand, nine hundred thirty-one".