23253220 has 24 divisors (see below), whose sum is σ = 49755384. Its totient is φ = 9125376.

The previous prime is 23253211. The next prime is 23253227. The reversal of 23253220 is 2235232.

It can be written as a sum of positive squares in 4 ways, for example, as 1425636 + 21827584 = 1194^2 + 4672^2 .

It is not an unprimeable number, because it can be changed into a prime (23253227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9909 + ... + 12028.

It is an arithmetic number, because the mean of its divisors is an integer number (2073141).

Almost surely, 2^23253220 is an apocalyptic number.

23253220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23253220 is an abundant number, since it is smaller than the sum of its proper divisors (26502164).

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

23253220 is a wasteful number, since it uses less digits than its factorization.

23253220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21999 (or 21997 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 23253220 is about 4822.1592673822. The cubic root of 23253220 is about 285.4265491336.

Adding to 23253220 its reverse (2235232), we get a palindrome (25488452).

The spelling of 23253220 in words is "twenty-three million, two hundred fifty-three thousand, two hundred twenty".