21741319 has 2 divisors, whose sum is σ = 21741320. Its totient is φ = 21741318.

The previous prime is 21741287. The next prime is 21741337. The reversal of 21741319 is 91314712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21741319 - 2⁵ = 21741287 is a prime.

It is a super-2 number, since 2×21741319² = 945369903719522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21741389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10870659 + 10870660.

It is an arithmetic number, because the mean of its divisors is an integer number (10870660).

Almost surely, 2^21741319 is an apocalyptic number.

21741319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21741319 is an equidigital number, since it uses as much as digits as its factorization.

21741319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 21741319 is about 4662.7587327675. The cubic root of 21741319 is about 279.1013664549.

The spelling of 21741319 in words is "twenty-one million, seven hundred forty-one thousand, three hundred nineteen".