22394621 has 4 divisors (see below), whose sum is σ = 22440000. Its totient is φ = 22349244.

The previous prime is 22394609. The next prime is 22394623. The reversal of 22394621 is 12649322.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22394621 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22394623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21941 + ... + 22938.

It is an arithmetic number, because the mean of its divisors is an integer number (5610000).

Almost surely, 2^22394621 is an apocalyptic number.

It is an amenable number.

22394621 is a deficient number, since it is larger than the sum of its proper divisors (45379).

22394621 is an equidigital number, since it uses as much as digits as its factorization.

22394621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45378.

The product of its digits is 5184, while the sum is 29.

The square root of 22394621 is about 4732.2955317689. The cubic root of 22394621 is about 281.8693835358.

The spelling of 22394621 in words is "twenty-two million, three hundred ninety-four thousand, six hundred twenty-one".