20323220031231 has 16 divisors (see below), whose sum is σ = 29182442147040. Its totient is φ = 12506432964480.

The previous prime is 20323220031227. The next prime is 20323220031239. The reversal of 20323220031231 is 13213002232302.

It is not a de Polignac number, because 20323220031231 - 2² = 20323220031227 is a prime.

It is a super-2 number, since 2×20323220031231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323220031239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369136 + ... + 6386133.

It is an arithmetic number, because the mean of its divisors is an integer number (1823902634190).

Almost surely, 2^{20323220031231} is an apocalyptic number.

20323220031231 is a deficient number, since it is larger than the sum of its proper divisors (8859222115809).

20323220031231 is a wasteful number, since it uses less digits than its factorization.

20323220031231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832426.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 20323220031231 its reverse (13213002232302), we get a palindrome (33536222263533).

The spelling of 20323220031231 in words is "twenty trillion, three hundred twenty-three billion, two hundred twenty million, thirty-one thousand, two hundred thirty-one".