22163642 has 8 divisors (see below), whose sum is σ = 33574932. Its totient is φ = 10972000.

The previous prime is 22163641. The next prime is 22163663. The reversal of 22163642 is 24636122.

It can be written as a sum of positive squares in 2 ways, for example, as 17230801 + 4932841 = 4151^2 + 2221^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54659 + ... + 55062.

Almost surely, 2^22163642 is an apocalyptic number.

22163642 is a deficient number, since it is larger than the sum of its proper divisors (11411290).

22163642 is a wasteful number, since it uses less digits than its factorization.

22163642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109824.

The product of its digits is 3456, while the sum is 26.

The square root of 22163642 is about 4707.8277368655. The cubic root of 22163642 is about 280.8969620070.

Adding to 22163642 its reverse (24636122), we get a palindrome (46799764).

The spelling of 22163642 in words is "twenty-two million, one hundred sixty-three thousand, six hundred forty-two".