20423103231 has 32 divisors (see below), whose sum is σ = 29405707200. Its totient is φ = 12580807680.

The previous prime is 20423103209. The next prime is 20423103241. The reversal of 20423103231 is 13230132402.

It is not a de Polignac number, because 20423103231 - 2⁵ = 20423103199 is a prime.

It is a super-2 number, since 2×20423103231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20423103198 and 20423103207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423103241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144355 + ... + 248363.

It is an arithmetic number, because the mean of its divisors is an integer number (918928350).

Almost surely, 2^20423103231 is an apocalyptic number.

20423103231 is a deficient number, since it is larger than the sum of its proper divisors (8982603969).

20423103231 is a wasteful number, since it uses less digits than its factorization.

20423103231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104139.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 20423103231 its reverse (13230132402), we get a palindrome (33653235633).

The spelling of 20423103231 in words is "twenty billion, four hundred twenty-three million, one hundred three thousand, two hundred thirty-one".