22024621 has 2 divisors, whose sum is σ = 22024622. Its totient is φ = 22024620.

The previous prime is 22024619. The next prime is 22024661. The reversal of 22024621 is 12642022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18361225 + 3663396 = 4285^2 + 1914^2 .

It is a cyclic number.

It is not a de Polignac number, because 22024621 - 2¹ = 22024619 is a prime.

Together with 22024619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22024661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11012310 + 11012311.

It is an arithmetic number, because the mean of its divisors is an integer number (11012311).

Almost surely, 2^22024621 is an apocalyptic number.

It is an amenable number.

22024621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22024621 is an equidigital number, since it uses as much as digits as its factorization.

22024621 is an evil number, because the sum of its binary digits is even.

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

The square root of 22024621 is about 4693.0396333293. The cubic root of 22024621 is about 280.3084228993.

Adding to 22024621 its reverse (12642022), we get a palindrome (34666643).

The spelling of 22024621 in words is "twenty-two million, twenty-four thousand, six hundred twenty-one".