20342131 has 2 divisors, whose sum is σ = 20342132. Its totient is φ = 20342130.

The previous prime is 20342129. The next prime is 20342167. The reversal of 20342131 is 13124302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20342131 - 2¹ = 20342129 is a prime.

It is a super-2 number, since 2×20342131² = 827604587242322, which contains 22 as substring.

Together with 20342129, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20342431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171065 + 10171066.

It is an arithmetic number, because the mean of its divisors is an integer number (10171066).

Almost surely, 2^20342131 is an apocalyptic number.

20342131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20342131 is an equidigital number, since it uses as much as digits as its factorization.

20342131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20342131 is about 4510.2251606766. The cubic root of 20342131 is about 272.9808293819.

Adding to 20342131 its reverse (13124302), we get a palindrome (33466433).

The spelling of 20342131 in words is "twenty million, three hundred forty-two thousand, one hundred thirty-one".