20110423231 has 4 divisors (see below), whose sum is σ = 20111113152. Its totient is φ = 20109733312.

The previous prime is 20110423183. The next prime is 20110423237. The reversal of 20110423231 is 13232401102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20110423231 is a prime.

It is a super-2 number, since 2×20110423231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20110423199 and 20110423208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110423237) 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, 299215 + ... + 360208.

It is an arithmetic number, because the mean of its divisors is an integer number (5027778288).

Almost surely, 2^20110423231 is an apocalyptic number.

20110423231 is a deficient number, since it is larger than the sum of its proper divisors (689921).

20110423231 is an equidigital number, since it uses as much as digits as its factorization.

20110423231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689920.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20110423231 its reverse (13232401102), we get a palindrome (33342824333).

The spelling of 20110423231 in words is "twenty billion, one hundred ten million, four hundred twenty-three thousand, two hundred thirty-one".