20422130231 has 4 divisors (see below), whose sum is σ = 20422428000. Its totient is φ = 20421832464.

The previous prime is 20422130213. The next prime is 20422130251. The reversal of 20422130231 is 13203122402.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20422130231 - 2¹⁰ = 20422129207 is a prime.

It is a super-2 number, since 2×20422130231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422130251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11795 + ... + 202443.

It is an arithmetic number, because the mean of its divisors is an integer number (5105607000).

Almost surely, 2^20422130231 is an apocalyptic number.

20422130231 is a deficient number, since it is larger than the sum of its proper divisors (297769).

20422130231 is a wasteful number, since it uses less digits than its factorization.

20422130231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297768.

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

Adding to 20422130231 its reverse (13203122402), we get a palindrome (33625252633).

The spelling of 20422130231 in words is "twenty billion, four hundred twenty-two million, one hundred thirty thousand, two hundred thirty-one".