22001004 has 24 divisors (see below), whose sum is σ = 57039920. Its totient is φ = 7333632.

The previous prime is 22000963. The next prime is 22001033. The reversal of 22001004 is 40010022.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101749 + ... + 101964.

Almost surely, 2^22001004 is an apocalyptic number.

It is an amenable number.

22001004 is an abundant number, since it is smaller than the sum of its proper divisors (35038916).

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

22001004 is a wasteful number, since it uses less digits than its factorization.

22001004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203726 (or 203718 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 22001004 is about 4690.5227853620. The cubic root of 22001004 is about 280.2081954969.

Adding to 22001004 its reverse (40010022), we get a palindrome (62011026).

The spelling of 22001004 in words is "twenty-two million, one thousand, four".