22026645 has 24 divisors (see below), whose sum is σ = 40426776. Its totient is φ = 11056128.

The previous prime is 22026601. The next prime is 22026649. The reversal of 22026645 is 54662022.

It can be written as a sum of positive squares in 4 ways, for example, as 2604996 + 19421649 = 1614^2 + 4407^2 .

It is not a de Polignac number, because 22026645 - 2⁷ = 22026517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22026649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13632 + ... + 15161.

It is an arithmetic number, because the mean of its divisors is an integer number (1684449).

Almost surely, 2^22026645 is an apocalyptic number.

It is an amenable number.

22026645 is a deficient number, since it is larger than the sum of its proper divisors (18400131).

22026645 is a wasteful number, since it uses less digits than its factorization.

22026645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28821 (or 28818 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 22026645 is about 4693.2552668697. The cubic root of 22026645 is about 280.3170091518.

Adding to 22026645 its reverse (54662022), we get a palindrome (76688667).

The spelling of 22026645 in words is "twenty-two million, twenty-six thousand, six hundred forty-five".