23031318 has 16 divisors (see below), whose sum is σ = 46211760. Its totient is φ = 7652256.

The previous prime is 23031313. The next prime is 23031319. The reversal of 23031318 is 81313032.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 23031294 and 23031303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031313) 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, 4153 + ... + 7956.

It is an arithmetic number, because the mean of its divisors is an integer number (2888235).

Almost surely, 2^23031318 is an apocalyptic number.

23031318 is an abundant number, since it is smaller than the sum of its proper divisors (23180442).

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

23031318 is a wasteful number, since it uses less digits than its factorization.

23031318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12431.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 23031318 is about 4799.0955397866. The cubic root of 23031318 is about 284.5157180312.

The spelling of 23031318 in words is "twenty-three million, thirty-one thousand, three hundred eighteen".