21104022 has 16 divisors (see below), whose sum is σ = 44429760. Its totient is φ = 6664392.

The previous prime is 21104011. The next prime is 21104029. The reversal of 21104022 is 22040112.

It is a junction number, because it is equal to n+sod(n) for n = 21103989 and 21104007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104029) 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, 92448 + ... + 92675.

It is an arithmetic number, because the mean of its divisors is an integer number (2776860).

Almost surely, 2^21104022 is an apocalyptic number.

21104022 is an abundant number, since it is smaller than the sum of its proper divisors (23325738).

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

21104022 is a wasteful number, since it uses less digits than its factorization.

21104022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185147.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 21104022 is about 4593.9114053277. The cubic root of 21104022 is about 276.3472053379.

Adding to 21104022 its reverse (22040112), we get a palindrome (43144134).

The spelling of 21104022 in words is "twenty-one million, one hundred four thousand, twenty-two".