21322024 has 8 divisors (see below), whose sum is σ = 39978810. Its totient is φ = 10661008.

The previous prime is 21322019. The next prime is 21322031. The reversal of 21322024 is 42022312.

It can be written as a sum of positive squares in only one way, i.e., 16402500 + 4919524 = 4050^2 + 2218^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21321989 and 21322007.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332619 + ... + 1332634.

Almost surely, 2^21322024 is an apocalyptic number.

It is an amenable number.

21322024 is a deficient number, since it is larger than the sum of its proper divisors (18656786).

21322024 is a wasteful number, since it uses less digits than its factorization.

21322024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665259 (or 2665255 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 21322024 is about 4617.5777199740. The cubic root of 21322024 is about 277.2954919913.

Adding to 21322024 its reverse (42022312), we get a palindrome (63344336).

The spelling of 21322024 in words is "twenty-one million, three hundred twenty-two thousand, twenty-four".