23012320031 has 4 divisors (see below), whose sum is σ = 23012809464. Its totient is φ = 23011830600.

The previous prime is 23012319983. The next prime is 23012320039. The reversal of 23012320031 is 13002321032.

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-23012320031 is a prime.

It is a super-2 number, since 2×23012320031² (a number of 22 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 = 23012319991 and 23012320009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23012320039) 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, 165680 + ... + 271061.

It is an arithmetic number, because the mean of its divisors is an integer number (5753202366).

Almost surely, 2^23012320031 is an apocalyptic number.

23012320031 is a deficient number, since it is larger than the sum of its proper divisors (489433).

23012320031 is an equidigital number, since it uses as much as digits as its factorization.

23012320031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489432.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 23012320031 its reverse (13002321032), we get a palindrome (36014641063).

The spelling of 23012320031 in words is "twenty-three billion, twelve million, three hundred twenty thousand, thirty-one".