22103604 has 60 divisors (see below), whose sum is σ = 61197444. Its totient is φ = 6932736.

The previous prime is 22103579. The next prime is 22103611. The reversal of 22103604 is 40630122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17892900 + 4210704 = 4230^2 + 2052^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3502 + ... + 7514.

Almost surely, 2^22103604 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 22103604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30598722).

22103604 is an abundant number, since it is smaller than the sum of its proper divisors (39093840).

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

22103604 is a wasteful number, since it uses less digits than its factorization.

22103604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046 (or 4035 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 22103604 is about 4701.4470112934. The cubic root of 22103604 is about 280.6430966516.

Adding to 22103604 its reverse (40630122), we get a palindrome (62733726).

The spelling of 22103604 in words is "twenty-two million, one hundred three thousand, six hundred four".