20340042131 has 2 divisors, whose sum is σ = 20340042132. Its totient is φ = 20340042130.

The previous prime is 20340042109. The next prime is 20340042137. The reversal of 20340042131 is 13124004302.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20340042131 - 2¹⁸ = 20339779987 is a prime.

It is a super-2 number, since 2×20340042131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20340042137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10170021065 + 10170021066.

It is an arithmetic number, because the mean of its divisors is an integer number (10170021066).

Almost surely, 2^20340042131 is an apocalyptic number.

20340042131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20340042131 is an equidigital number, since it uses as much as digits as its factorization.

20340042131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20340042131 its reverse (13124004302), we get a palindrome (33464046433).

The spelling of 20340042131 in words is "twenty billion, three hundred forty million, forty-two thousand, one hundred thirty-one".