22203664 has 60 divisors (see below), whose sum is σ = 50663424. Its totient is φ = 9398592.

The previous prime is 22203653. The next prime is 22203667. The reversal of 22203664 is 46630222.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22203667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99457 + ... + 99679.

Almost surely, 2^22203664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22203664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25331712).

22203664 is an abundant number, since it is smaller than the sum of its proper divisors (28459760).

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

22203664 is a wasteful number, since it uses less digits than its factorization.

22203664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 22203664 is about 4712.0764000597. The cubic root of 22203664 is about 281.0659369166.

Adding to 22203664 its reverse (46630222), we get a palindrome (68833886).

The spelling of 22203664 in words is "twenty-two million, two hundred three thousand, six hundred sixty-four".