22022004 has 24 divisors (see below), whose sum is σ = 54407808. Its totient is φ = 6908800.

The previous prime is 22021981. The next prime is 22022009. The reversal of 22022004 is 40022022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22022009) 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, 53772 + ... + 54179.

It is an arithmetic number, because the mean of its divisors is an integer number (2266992).

Almost surely, 2^22022004 is an apocalyptic number.

It is an amenable number.

22022004 is an abundant number, since it is smaller than the sum of its proper divisors (32385804).

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

22022004 is a wasteful number, since it uses less digits than its factorization.

22022004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107975 (or 107973 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 22022004 is about 4692.7608078827. The cubic root of 22022004 is about 280.2973202308.

Adding to 22022004 its reverse (40022022), we get a palindrome (62044026).

The spelling of 22022004 in words is "twenty-two million, twenty-two thousand, four".