22821393 has 16 divisors (see below), whose sum is σ = 34928640. Its totient is φ = 12983376.

The previous prime is 22821391. The next prime is 22821397. The reversal of 22821393 is 39312822.

It is a happy number.

It is not a de Polignac number, because 22821393 - 2¹ = 22821391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22821393.

It is not an unprimeable number, because it can be changed into a prime (22821391) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2746 + ... + 7292.

It is an arithmetic number, because the mean of its divisors is an integer number (2183040).

Almost surely, 2^22821393 is an apocalyptic number.

It is an amenable number.

22821393 is a deficient number, since it is larger than the sum of its proper divisors (12107247).

22821393 is a wasteful number, since it uses less digits than its factorization.

22821393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4796.

The product of its digits is 5184, while the sum is 30.

The square root of 22821393 is about 4777.1741647129. The cubic root of 22821393 is about 283.6486471972.

The spelling of 22821393 in words is "twenty-two million, eight hundred twenty-one thousand, three hundred ninety-three".