22000004 has 24 divisors (see below), whose sum is σ = 42430080. Its totient is φ = 9916704.

The previous prime is 22000003. The next prime is 22000021. The reversal of 22000004 is 40000022.

It is a junction number, because it is equal to n+sod(n) for n = 21999955 and 22000000.

It is not an unprimeable number, because it can be changed into a prime (22000001) 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, 2684 + ... + 7155.

It is an arithmetic number, because the mean of its divisors is an integer number (1767920).

Almost surely, 2^22000004 is an apocalyptic number.

It is an amenable number.

22000004 is a deficient number, since it is larger than the sum of its proper divisors (20430076).

22000004 is a wasteful number, since it uses less digits than its factorization.

22000004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9899 (or 9897 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 8.

The square root of 22000004 is about 4690.4161862248. The cubic root of 22000004 is about 280.2039500476.

Adding to 22000004 its reverse (40000022), we get a palindrome (62000026).

The spelling of 22000004 in words is "twenty-two million, four", and thus it is an aban number.