21932319 has 4 divisors (see below), whose sum is σ = 29243096. Its totient is φ = 14621544.

The previous prime is 21932269. The next prime is 21932341. The reversal of 21932319 is 91323912.

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 21932319 - 2⁸ = 21932063 is a prime.

It is a super-2 number, since 2×21932319² = 962053233435522, 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 (21932369) 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, 3655384 + ... + 3655389.

It is an arithmetic number, because the mean of its divisors is an integer number (7310774).

Almost surely, 2^21932319 is an apocalyptic number.

21932319 is a deficient number, since it is larger than the sum of its proper divisors (7310777).

21932319 is an equidigital number, since it uses as much as digits as its factorization.

21932319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7310776.

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

The square root of 21932319 is about 4683.1953834962. The cubic root of 21932319 is about 279.9162972594.

The spelling of 21932319 in words is "twenty-one million, nine hundred thirty-two thousand, three hundred nineteen".