22002004 has 12 divisors (see below), whose sum is σ = 38845044. Its totient is φ = 10903424.

The previous prime is 22001999. The next prime is 22002011. The reversal of 22002004 is 40020022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4796100 + 17205904 = 2190^2 + 4148^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23887 + ... + 24790.

It is an arithmetic number, because the mean of its divisors is an integer number (3237087).

Almost surely, 2^22002004 is an apocalyptic number.

It is an amenable number.

22002004 is a deficient number, since it is larger than the sum of its proper divisors (16843040).

22002004 is a wasteful number, since it uses less digits than its factorization.

22002004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48794 (or 48792 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 22002004 is about 4690.6293820766. The cubic root of 22002004 is about 280.2124408175.

Adding to 22002004 its reverse (40020022), we get a palindrome (62022026).

The spelling of 22002004 in words is "twenty-two million, two thousand, four".