21345322 has 16 divisors (see below), whose sum is σ = 33840000. Its totient is φ = 10069920.

The previous prime is 21345287. The next prime is 21345347. The reversal of 21345322 is 22354312.

It is a junction number, because it is equal to n+sod(n) for n = 21345293 and 21345302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9679 + ... + 11677.

It is an arithmetic number, because the mean of its divisors is an integer number (2115000).

Almost surely, 2^21345322 is an apocalyptic number.

21345322 is a deficient number, since it is larger than the sum of its proper divisors (12494678).

21345322 is a wasteful number, since it uses less digits than its factorization.

21345322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2301.

The product of its digits is 1440, while the sum is 22.

The square root of 21345322 is about 4620.0997824722. The cubic root of 21345322 is about 277.3964529938.

Adding to 21345322 its reverse (22354312), we get a palindrome (43699634).

The spelling of 21345322 in words is "twenty-one million, three hundred forty-five thousand, three hundred twenty-two".