22126645 has 4 divisors (see below), whose sum is σ = 26551980. Its totient is φ = 17701312.

The previous prime is 22126631. The next prime is 22126651. The reversal of 22126645 is 54662122.

22126645 = 1483² + 1484² + ... + 1492².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3541924 + 18584721 = 1882^2 + 4311^2 .

It is a cyclic number.

It is not a de Polignac number, because 22126645 - 2¹⁷ = 21995573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2212660 + ... + 2212669.

It is an arithmetic number, because the mean of its divisors is an integer number (6637995).

Almost surely, 2^22126645 is an apocalyptic number.

It is an amenable number.

22126645 is a deficient number, since it is larger than the sum of its proper divisors (4425335).

22126645 is an equidigital number, since it uses as much as digits as its factorization.

22126645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4425334.

The product of its digits is 5760, while the sum is 28.

The square root of 22126645 is about 4703.8967888337. The cubic root of 22126645 is about 280.7405777690.

Adding to 22126645 its reverse (54662122), we get a palindrome (76788767).

The spelling of 22126645 in words is "twenty-two million, one hundred twenty-six thousand, six hundred forty-five".