20422340231 has 2 divisors, whose sum is σ = 20422340232. Its totient is φ = 20422340230.

The previous prime is 20422340207. The next prime is 20422340293. The reversal of 20422340231 is 13204322402.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20422340231 is a prime.

It is a super-2 number, since 2×20422340231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20422340197 and 20422340206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20422340201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211170115 + 10211170116.

It is an arithmetic number, because the mean of its divisors is an integer number (10211170116).

Almost surely, 2^20422340231 is an apocalyptic number.

20422340231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20422340231 is an equidigital number, since it uses as much as digits as its factorization.

20422340231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20422340231 its reverse (13204322402), we get a palindrome (33626662633).

The spelling of 20422340231 in words is "twenty billion, four hundred twenty-two million, three hundred forty thousand, two hundred thirty-one".