20102320231 has 4 divisors (see below), whose sum is σ = 22974080272. Its totient is φ = 17230560192.

The previous prime is 20102320219. The next prime is 20102320237. The reversal of 20102320231 is 13202320102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13202320102 = 2 ⋅6601160051.

It is a cyclic number.

It is not a de Polignac number, because 20102320231 - 2¹⁵ = 20102287463 is a prime.

It is a super-2 number, since 2×20102320231² (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 (20102320237) 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, 1435880010 + ... + 1435880023.

It is an arithmetic number, because the mean of its divisors is an integer number (5743520068).

Almost surely, 2^20102320231 is an apocalyptic number.

20102320231 is a deficient number, since it is larger than the sum of its proper divisors (2871760041).

20102320231 is an equidigital number, since it uses as much as digits as its factorization.

20102320231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871760040.

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

Adding to 20102320231 its reverse (13202320102), we get a palindrome (33304640333).

The spelling of 20102320231 in words is "twenty billion, one hundred two million, three hundred twenty thousand, two hundred thirty-one".