21104422 has 8 divisors (see below), whose sum is σ = 32428872. Its totient is φ = 10294800.

The previous prime is 21104407. The next prime is 21104453. The reversal of 21104422 is 22440112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21104396 and 21104405.

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, 128604 + ... + 128767.

It is an arithmetic number, because the mean of its divisors is an integer number (4053609).

Almost surely, 2^21104422 is an apocalyptic number.

21104422 is a deficient number, since it is larger than the sum of its proper divisors (11324450).

21104422 is a wasteful number, since it uses less digits than its factorization.

21104422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257414.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 21104422 is about 4593.9549410067. The cubic root of 21104422 is about 276.3489512639.

Adding to 21104422 its reverse (22440112), we get a palindrome (43544534).

The spelling of 21104422 in words is "twenty-one million, one hundred four thousand, four hundred twenty-two".