21104413 has 8 divisors (see below), whose sum is σ = 23142240. Its totient is φ = 19086480.

The previous prime is 21104407. The next prime is 21104453. The reversal of 21104413 is 31440112.

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

It is a cyclic number.

It is not a de Polignac number, because 21104413 - 2¹⁷ = 20973341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104453) 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, 2703 + ... + 7036.

It is an arithmetic number, because the mean of its divisors is an integer number (2892780).

Almost surely, 2^21104413 is an apocalyptic number.

It is an amenable number.

21104413 is a deficient number, since it is larger than the sum of its proper divisors (2037827).

21104413 is a wasteful number, since it uses less digits than its factorization.

21104413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9947.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 21104413 is about 4593.9539614585. The cubic root of 21104413 is about 276.3489119808.

Adding to 21104413 its reverse (31440112), we get a palindrome (52544525).

The spelling of 21104413 in words is "twenty-one million, one hundred four thousand, four hundred thirteen".