22464821 has 8 divisors (see below), whose sum is σ = 24463200. Its totient is φ = 20548080.

The previous prime is 22464811. The next prime is 22464851. The reversal of 22464821 is 12846422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22464821 - 2¹⁰ = 22463797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22464811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19835 + ... + 20936.

It is an arithmetic number, because the mean of its divisors is an integer number (3057900).

Almost surely, 2^22464821 is an apocalyptic number.

It is an amenable number.

22464821 is a deficient number, since it is larger than the sum of its proper divisors (1998379).

22464821 is a wasteful number, since it uses less digits than its factorization.

22464821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40819.

The product of its digits is 6144, while the sum is 29.

The square root of 22464821 is about 4739.7068474749. The cubic root of 22464821 is about 282.1635998881.

The spelling of 22464821 in words is "twenty-two million, four hundred sixty-four thousand, eight hundred twenty-one".