21332719 has 8 divisors (see below), whose sum is σ = 22160160. Its totient is φ = 20511456.

The previous prime is 21332711. The next prime is 21332761. The reversal of 21332719 is 91723312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21332719 - 2³ = 21332711 is a prime.

It is a super-2 number, since 2×21332719² = 910169799865922, 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 (21332711) 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 7 ways as a sum of consecutive naturals, for example, 6229 + ... + 9025.

It is an arithmetic number, because the mean of its divisors is an integer number (2770020).

Almost surely, 2^21332719 is an apocalyptic number.

21332719 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21332719 is a deficient number, since it is larger than the sum of its proper divisors (827441).

21332719 is a wasteful number, since it uses less digits than its factorization.

21332719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089.

The product of its digits is 2268, while the sum is 28.

The square root of 21332719 is about 4618.7356495041. The cubic root of 21332719 is about 277.3418474963.

The spelling of 21332719 in words is "twenty-one million, three hundred thirty-two thousand, seven hundred nineteen".