21322983 has 12 divisors (see below), whose sum is σ = 31250744. Its totient is φ = 12922800.

The previous prime is 21322963. The next prime is 21322991. The reversal of 21322983 is 38922312.

It is a happy number.

It is not a de Polignac number, because 21322983 - 2¹⁰ = 21321959 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21322983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29008 + ... + 29733.

Almost surely, 2^21322983 is an apocalyptic number.

21322983 is a deficient number, since it is larger than the sum of its proper divisors (9927761).

21322983 is a wasteful number, since it uses less digits than its factorization.

21322983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58766 (or 58755 counting only the distinct ones).

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

The square root of 21322983 is about 4617.6815611300. The cubic root of 21322983 is about 277.2996492325.

It can be divided in two parts, 213229 and 83, that added together give a palindrome (213312).

The spelling of 21322983 in words is "twenty-one million, three hundred twenty-two thousand, nine hundred eighty-three".