21334319 has 2 divisors, whose sum is σ = 21334320. Its totient is φ = 21334318.

The previous prime is 21334253. The next prime is 21334333. The reversal of 21334319 is 91343312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21334319 - 2²⁴ = 4557103 is a prime.

It is a super-2 number, since 2×21334319² = 910306334387522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21334219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667159 + 10667160.

It is an arithmetic number, because the mean of its divisors is an integer number (10667160).

Almost surely, 2^21334319 is an apocalyptic number.

21334319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334319 is an equidigital number, since it uses as much as digits as its factorization.

21334319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

The square root of 21334319 is about 4618.9088538312. The cubic root of 21334319 is about 277.3487810688.

The spelling of 21334319 in words is "twenty-one million, three hundred thirty-four thousand, three hundred nineteen".