21422104 has 16 divisors (see below), whose sum is σ = 43818120. Its totient is φ = 9737280.

The previous prime is 21422099. The next prime is 21422117. The reversal of 21422104 is 40122412.

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, 121629 + ... + 121804.

Almost surely, 2^21422104 is an apocalyptic number.

It is an amenable number.

21422104 is an abundant number, since it is smaller than the sum of its proper divisors (22396016).

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

21422104 is a wasteful number, since it uses less digits than its factorization.

21422104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243450 (or 243446 counting only the distinct ones).

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

The square root of 21422104 is about 4628.4018840200. The cubic root of 21422104 is about 277.7286657825.

Adding to 21422104 its reverse (40122412), we get a palindrome (61544516).

The spelling of 21422104 in words is "twenty-one million, four hundred twenty-two thousand, one hundred four".