20322131 has 2 divisors, whose sum is σ = 20322132. Its totient is φ = 20322130.

The previous prime is 20322119. The next prime is 20322163. The reversal of 20322131 is 13122302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20322131 is a prime.

It is a super-2 number, since 2×20322131² = 825978016762322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20322331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10161065 + 10161066.

It is an arithmetic number, because the mean of its divisors is an integer number (10161066).

Almost surely, 2^20322131 is an apocalyptic number.

20322131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20322131 is an equidigital number, since it uses as much as digits as its factorization.

20322131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 20322131 is about 4508.0074312272. The cubic root of 20322131 is about 272.8913368433.

Adding to 20322131 its reverse (13122302), we get a palindrome (33444433).

The spelling of 20322131 in words is "twenty million, three hundred twenty-two thousand, one hundred thirty-one".