21834719 has 2 divisors, whose sum is σ = 21834720. Its totient is φ = 21834718.

The previous prime is 21834713. The next prime is 21834737. The reversal of 21834719 is 91743812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21834719 - 2¹⁶ = 21769183 is a prime.

It is a super-2 number, since 2×21834719² = 953509907617922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1379429 and since 21834719 and 1379429 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21834713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10917359 + 10917360.

It is an arithmetic number, because the mean of its divisors is an integer number (10917360).

Almost surely, 2^21834719 is an apocalyptic number.

21834719 is a deficient number, since it is larger than the sum of its proper divisors (1).

21834719 is an equidigital number, since it uses as much as digits as its factorization.

21834719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 21834719 is about 4672.7635292191. The cubic root of 21834719 is about 279.5004656275.

The spelling of 21834719 in words is "twenty-one million, eight hundred thirty-four thousand, seven hundred nineteen".