22004136 has 224 divisors, whose sum is σ = 78696000. Its totient is φ = 5715360.

The previous prime is 22004119. The next prime is 22004149. The reversal of 22004136 is 63140022.

It is a happy number.

It is a super-2 number, since 2×22004136² = 968364002212992, which contains 22 as substring.

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 55 ways as a sum of consecutive naturals, for example, 2000371 + ... + 2000381.

Almost surely, 2^22004136 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 22004136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39348000).

22004136 is an abundant number, since it is smaller than the sum of its proper divisors (56691864).

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

22004136 is an equidigital number, since it uses as much as digits as its factorization.

22004136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 23 counting only the distinct ones).

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

The square root of 22004136 is about 4690.8566381845. The cubic root of 22004136 is about 280.2214914117.

Adding to 22004136 its reverse (63140022), we get a palindrome (85144158).

It can be divided in two parts, 2200 and 4136, that added together give a palindrome (6336).

The spelling of 22004136 in words is "twenty-two million, four thousand, one hundred thirty-six".