23321919 has 4 divisors (see below), whose sum is σ = 31095896. Its totient is φ = 15547944.

The previous prime is 23321833. The next prime is 23321939. The reversal of 23321919 is 91912332.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23321919 - 2⁷ = 23321791 is a prime.

It is a super-2 number, since 2×23321919² = 1087823811685122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23321939) 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 3 ways as a sum of consecutive naturals, for example, 3886984 + ... + 3886989.

It is an arithmetic number, because the mean of its divisors is an integer number (7773974).

Almost surely, 2^23321919 is an apocalyptic number.

23321919 is a deficient number, since it is larger than the sum of its proper divisors (7773977).

23321919 is an equidigital number, since it uses as much as digits as its factorization.

23321919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7773976.

The product of its digits is 2916, while the sum is 30.

The square root of 23321919 is about 4829.2772751210. The cubic root of 23321919 is about 285.7073595583.

The spelling of 23321919 in words is "twenty-three million, three hundred twenty-one thousand, nine hundred nineteen".