22033621 has 4 divisors (see below), whose sum is σ = 22044352. Its totient is φ = 22022892.

The previous prime is 22033619. The next prime is 22033633. The reversal of 22033621 is 12633022.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22033621 - 2¹ = 22033619 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 (22033601) 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 3 ways as a sum of consecutive naturals, for example, 1215 + ... + 6748.

It is an arithmetic number, because the mean of its divisors is an integer number (5511088).

Almost surely, 2^22033621 is an apocalyptic number.

It is an amenable number.

22033621 is a deficient number, since it is larger than the sum of its proper divisors (10731).

22033621 is an equidigital number, since it uses as much as digits as its factorization.

22033621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10730.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 22033621 is about 4693.9984022153. The cubic root of 22033621 is about 280.3465988458.

Adding to 22033621 its reverse (12633022), we get a palindrome (34666643).

The spelling of 22033621 in words is "twenty-two million, thirty-three thousand, six hundred twenty-one".