23113220 has 24 divisors (see below), whose sum is σ = 52272024. Its totient is φ = 8534016.

The previous prime is 23113219. The next prime is 23113241. The reversal of 23113220 is 2231132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 92416 + 23020804 = 304^2 + 4798^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23113195 and 23113204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44189 + ... + 44708.

It is an arithmetic number, because the mean of its divisors is an integer number (2178001).

Almost surely, 2^23113220 is an apocalyptic number.

23113220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23113220 is an abundant number, since it is smaller than the sum of its proper divisors (29158804).

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

23113220 is a wasteful number, since it uses less digits than its factorization.

23113220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88919 (or 88917 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 23113220 is about 4807.6210333178. The cubic root of 23113220 is about 284.8525758520.

Adding to 23113220 its reverse (2231132), we get a palindrome (25344352).

The spelling of 23113220 in words is "twenty-three million, one hundred thirteen thousand, two hundred twenty".