23318881 has 4 divisors (see below), whose sum is σ = 23666992. Its totient is φ = 22970772.

The previous prime is 23318879. The next prime is 23318899. The reversal of 23318881 is 18881332.

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 23318881 - 2¹ = 23318879 is a prime.

It is a super-2 number, since 2×23318881² = 1087540422184322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23318821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173955 + ... + 174088.

It is an arithmetic number, because the mean of its divisors is an integer number (5916748).

Almost surely, 2^23318881 is an apocalyptic number.

It is an amenable number.

23318881 is a deficient number, since it is larger than the sum of its proper divisors (348111).

23318881 is an equidigital number, since it uses as much as digits as its factorization.

23318881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348110.

The product of its digits is 9216, while the sum is 34.

The square root of 23318881 is about 4828.9627250580. The cubic root of 23318881 is about 285.6949532514.

The spelling of 23318881 in words is "twenty-three million, three hundred eighteen thousand, eight hundred eighty-one".