22104020 has 12 divisors (see below), whose sum is σ = 46418484. Its totient is φ = 8841600.

The previous prime is 22103987. The next prime is 22104041. The reversal of 22104020 is 2040122.

It can be written as a sum of positive squares in 2 ways, for example, as 4648336 + 17455684 = 2156^2 + 4178^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22103992 and 22104010.

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, 552581 + ... + 552620.

It is an arithmetic number, because the mean of its divisors is an integer number (3868207).

Almost surely, 2^22104020 is an apocalyptic number.

22104020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22104020 is an abundant number, since it is smaller than the sum of its proper divisors (24314464).

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

22104020 is a wasteful number, since it uses less digits than its factorization.

22104020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105210 (or 1105208 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 22104020 is about 4701.4912527835. The cubic root of 22104020 is about 280.6448572513.

Adding to 22104020 its reverse (2040122), we get a palindrome (24144142).

The spelling of 22104020 in words is "twenty-two million, one hundred four thousand, twenty".