23919993 has 12 divisors (see below), whose sum is σ = 36369840. Its totient is φ = 15107256.

The previous prime is 23919967. The next prime is 23920007. The reversal of 23919993 is 39991932.

It is not a de Polignac number, because 23919993 - 2¹² = 23915897 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (23919913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69771 + ... + 70112.

It is an arithmetic number, because the mean of its divisors is an integer number (3030820).

Almost surely, 2^23919993 is an apocalyptic number.

It is an amenable number.

23919993 is a deficient number, since it is larger than the sum of its proper divisors (12449847).

23919993 is a wasteful number, since it uses less digits than its factorization.

23919993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139908 (or 139905 counting only the distinct ones).

The product of its digits is 118098, while the sum is 45.

The square root of 23919993 is about 4890.8069886267. The cubic root of 23919993 is about 288.1290292788.

The spelling of 23919993 in words is "twenty-three million, nine hundred nineteen thousand, nine hundred ninety-three".