22446621 has 6 divisors (see below), whose sum is σ = 32422910. Its totient is φ = 14964408.

The previous prime is 22446553. The next prime is 22446623. The reversal of 22446621 is 12664422.

It can be written as a sum of positive squares in only one way, i.e., 11655396 + 10791225 = 3414^2 + 3285^2 .

It is not a de Polignac number, because 22446621 - 2¹⁰ = 22445597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22446623) 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 5 ways as a sum of consecutive naturals, for example, 1247026 + ... + 1247043.

Almost surely, 2^22446621 is an apocalyptic number.

It is an amenable number.

22446621 is a deficient number, since it is larger than the sum of its proper divisors (9976289).

22446621 is a wasteful number, since it uses less digits than its factorization.

22446621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494075 (or 2494072 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 22446621 is about 4737.7865084868. The cubic root of 22446621 is about 282.0873804966.

The spelling of 22446621 in words is "twenty-two million, four hundred forty-six thousand, six hundred twenty-one".