21422365 has 8 divisors (see below), whose sum is σ = 26254080. Its totient is φ = 16773072.

The previous prime is 21422347. The next prime is 21422381. The reversal of 21422365 is 56322412.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21422365 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45345 + ... + 45814.

It is an arithmetic number, because the mean of its divisors is an integer number (3281760).

Almost surely, 2^21422365 is an apocalyptic number.

It is an amenable number.

21422365 is a deficient number, since it is larger than the sum of its proper divisors (4831715).

21422365 is an equidigital number, since it uses as much as digits as its factorization.

21422365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91211.

The product of its digits is 2880, while the sum is 25.

The square root of 21422365 is about 4628.4300794114. The cubic root of 21422365 is about 277.7297936968.

Adding to 21422365 its reverse (56322412), we get a palindrome (77744777).

The spelling of 21422365 in words is "twenty-one million, four hundred twenty-two thousand, three hundred sixty-five".