23309812 has 24 divisors (see below), whose sum is σ = 42283080. Its totient is φ = 11235840.

The previous prime is 23309809. The next prime is 23309813. The reversal of 23309812 is 21890332.

It can be written as a sum of positive squares in 4 ways, for example, as 1069156 + 22240656 = 1034^2 + 4716^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23309813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13798 + ... + 15394.

It is an arithmetic number, because the mean of its divisors is an integer number (1761795).

Almost surely, 2^23309812 is an apocalyptic number.

It is an amenable number.

23309812 is a deficient number, since it is larger than the sum of its proper divisors (18973268).

23309812 is a wasteful number, since it uses less digits than its factorization.

23309812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731 (or 1729 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 23309812 is about 4828.0236122041. The cubic root of 23309812 is about 285.6579116871.

The spelling of 23309812 in words is "twenty-three million, three hundred nine thousand, eight hundred twelve".