23313220 has 36 divisors (see below), whose sum is σ = 56953260. Its totient is φ = 7992768.

The previous prime is 23313211. The next prime is 23313259. The reversal of 23313220 is 2231332.

It can be written as a sum of positive squares in 2 ways, for example, as 6140484 + 17172736 = 2478^2 + 4144^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23313194 and 23313203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10915 + ... + 12874.

It is an arithmetic number, because the mean of its divisors is an integer number (1582035).

Almost surely, 2^23313220 is an apocalyptic number.

23313220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23313220 is an abundant number, since it is smaller than the sum of its proper divisors (33640040).

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

23313220 is a wasteful number, since it uses less digits than its factorization.

23313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23812 (or 23803 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 23313220 is about 4828.3765387550. The cubic root of 23313220 is about 285.6718325019.

Adding to 23313220 its reverse (2231332), we get a palindrome (25544552).

The spelling of 23313220 in words is "twenty-three million, three hundred thirteen thousand, two hundred twenty".