21622024 has 16 divisors (see below), whose sum is σ = 42304320. Its totient is φ = 10340880.

The previous prime is 21621997. The next prime is 21622033. The reversal of 21622024 is 42022612.

It is a junction number, because it is equal to n+sod(n) for n = 21621992 and 21622010.

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 3 ways as a sum of consecutive naturals, for example, 58572 + ... + 58939.

It is an arithmetic number, because the mean of its divisors is an integer number (2644020).

Almost surely, 2^21622024 is an apocalyptic number.

It is an amenable number.

21622024 is a deficient number, since it is larger than the sum of its proper divisors (20682296).

21622024 is a wasteful number, since it uses less digits than its factorization.

21622024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117540 (or 117536 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 21622024 is about 4649.9488169226. The cubic root of 21622024 is about 278.5899518944.

Adding to 21622024 its reverse (42022612), we get a palindrome (63644636).

It can be divided in two parts, 2162 and 2024, that added together give a triangular number (4186 = T₉₁).

The spelling of 21622024 in words is "twenty-one million, six hundred twenty-two thousand, twenty-four".