22003856 has 40 divisors (see below), whose sum is σ = 48996864. Its totient is φ = 9377280.

The previous prime is 22003853. The next prime is 22003903. The reversal of 22003856 is 65830022.

It is not an unprimeable number, because it can be changed into a prime (22003853) 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, 24536 + ... + 25416.

Almost surely, 2^22003856 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 22003856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24498432).

22003856 is an abundant number, since it is smaller than the sum of its proper divisors (26993008).

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

22003856 is a wasteful number, since it uses less digits than its factorization.

22003856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 22003856 is about 4690.8267927946. The cubic root of 22003856 is about 280.2203028117.

Adding to 22003856 its reverse (65830022), we get a palindrome (87833878).

The spelling of 22003856 in words is "twenty-two million, three thousand, eight hundred fifty-six".