23393681 has 4 divisors (see below), whose sum is σ = 23457792. Its totient is φ = 23329572.

The previous prime is 23393659. The next prime is 23393687. The reversal of 23393681 is 18639332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23393681 - 2¹⁰ = 23392657 is a prime.

It is a super-2 number, since 2×23393681² = 1094528621459522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23393687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31505 + ... + 32238.

It is an arithmetic number, because the mean of its divisors is an integer number (5864448).

Almost surely, 2^23393681 is an apocalyptic number.

It is an amenable number.

23393681 is a deficient number, since it is larger than the sum of its proper divisors (64111).

23393681 is an equidigital number, since it uses as much as digits as its factorization.

23393681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64110.

The product of its digits is 23328, while the sum is 35.

The square root of 23393681 is about 4836.7014586389. The cubic root of 23393681 is about 286.0001018794. Note that the first 3 decimals are identical.

The spelling of 23393681 in words is "twenty-three million, three hundred ninety-three thousand, six hundred eighty-one".