23031993 has 16 divisors (see below), whose sum is σ = 32155776. Its totient is φ = 14636160.

The previous prime is 23031959. The next prime is 23032001. The reversal of 23031993 is 39913032.

It is not a de Polignac number, because 23031993 - 2⁶ = 23031929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23031993.

It is not an unprimeable number, because it can be changed into a prime (23031913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37021 + ... + 37637.

It is an arithmetic number, because the mean of its divisors is an integer number (2009736).

Almost surely, 2^23031993 is an apocalyptic number.

23031993 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

23031993 is a deficient number, since it is larger than the sum of its proper divisors (9123783).

23031993 is a wasteful number, since it uses less digits than its factorization.

23031993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184.

The product of its (nonzero) digits is 4374, while the sum is 30.

The square root of 23031993 is about 4799.1658650228. The cubic root of 23031993 is about 284.5184975253.

It can be divided in two parts, 230 and 31993, that added together give a palindrome (32223).

The spelling of 23031993 in words is "twenty-three million, thirty-one thousand, nine hundred ninety-three".