22145636 has 6 divisors (see below), whose sum is σ = 38754870. Its totient is φ = 11072816.

The previous prime is 22145609. The next prime is 22145653. The reversal of 22145636 is 63654122.

It can be written as a sum of positive squares in only one way, i.e., 17172736 + 4972900 = 4144^2 + 2230^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22145599 and 22145608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2768201 + ... + 2768208.

It is an arithmetic number, because the mean of its divisors is an integer number (6459145).

Almost surely, 2^22145636 is an apocalyptic number.

It is an amenable number.

22145636 is a deficient number, since it is larger than the sum of its proper divisors (16609234).

22145636 is a wasteful number, since it uses less digits than its factorization.

22145636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536413 (or 5536411 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 22145636 is about 4705.9150013573. The cubic root of 22145636 is about 280.8208734142.

Adding to 22145636 its reverse (63654122), we get a palindrome (85799758).

The spelling of 22145636 in words is "twenty-two million, one hundred forty-five thousand, six hundred thirty-six".