22163646 has 16 divisors (see below), whose sum is σ = 45164304. Its totient is φ = 7248384.

The previous prime is 22163641. The next prime is 22163663. The reversal of 22163646 is 64636122.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22163641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34531 + ... + 35166.

It is an arithmetic number, because the mean of its divisors is an integer number (2822769).

Almost surely, 2^22163646 is an apocalyptic number.

22163646 is an abundant number, since it is smaller than the sum of its proper divisors (23000658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22163646 is a wasteful number, since it uses less digits than its factorization.

22163646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69755.

The product of its digits is 10368, while the sum is 30.

The square root of 22163646 is about 4707.8281616898. The cubic root of 22163646 is about 280.8969789054.

Adding to 22163646 its reverse (64636122), we get a palindrome (86799768).

The spelling of 22163646 in words is "twenty-two million, one hundred sixty-three thousand, six hundred forty-six".