23123211320 has 48 divisors (see below), whose sum is σ = 57186962280. Its totient is φ = 8408438720.

The previous prime is 23123211301. The next prime is 23123211347. The reversal of 23123211320 is 2311232132.

It is a super-2 number, since 2×23123211320² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 23123211292 and 23123211301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2383922 + ... + 2393601.

Almost surely, 2^23123211320 is an apocalyptic number.

23123211320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23123211320 is an abundant number, since it is smaller than the sum of its proper divisors (34063750960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23123211320 is a wasteful number, since it uses less digits than its factorization.

23123211320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777556 (or 4777541 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23123211320 its reverse (2311232132), we get a palindrome (25434443452).

The spelling of 23123211320 in words is "twenty-three billion, one hundred twenty-three million, two hundred eleven thousand, three hundred twenty".