21734315 has 4 divisors (see below), whose sum is σ = 26081184. Its totient is φ = 17387448.

The previous prime is 21734303. The next prime is 21734327. The reversal of 21734315 is 51343712.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21734303) and next prime (21734327).

It is a cyclic number.

It is not a de Polignac number, because 21734315 - 2²² = 17540011 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2173427 + ... + 2173436.

It is an arithmetic number, because the mean of its divisors is an integer number (6520296).

Almost surely, 2^21734315 is an apocalyptic number.

21734315 is a deficient number, since it is larger than the sum of its proper divisors (4346869).

21734315 is an equidigital number, since it uses as much as digits as its factorization.

21734315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4346868.

The product of its digits is 2520, while the sum is 26.

The square root of 21734315 is about 4662.0076147514. The cubic root of 21734315 is about 279.0713922550.

The spelling of 21734315 in words is "twenty-one million, seven hundred thirty-four thousand, three hundred fifteen".