22352004 has 48 divisors (see below), whose sum is σ = 58833600. Its totient is φ = 7337088.

The previous prime is 22351993. The next prime is 22352051. The reversal of 22352004 is 40025322.

It is a super-2 number, since 2×22352004² = 999224165632032, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5692 + ... + 8780.

It is an arithmetic number, because the mean of its divisors is an integer number (1225700).

Almost surely, 2^22352004 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 22352004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29416800).

22352004 is an abundant number, since it is smaller than the sum of its proper divisors (36481596).

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

22352004 is a wasteful number, since it uses less digits than its factorization.

22352004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3169 (or 3161 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 22352004 is about 4727.7906045002. The cubic root of 22352004 is about 281.6904706997.

Adding to 22352004 its reverse (40025322), we get a palindrome (62377326).

The spelling of 22352004 in words is "twenty-two million, three hundred fifty-two thousand, four".