21104133 has 8 divisors (see below), whose sum is σ = 29362368. Its totient is φ = 13457664.

The previous prime is 21104131. The next prime is 21104143. The reversal of 21104133 is 33140112.

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

It is not a de Polignac number, because 21104133 - 2¹ = 21104131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152860 + ... + 152997.

It is an arithmetic number, because the mean of its divisors is an integer number (3670296).

Almost surely, 2^21104133 is an apocalyptic number.

21104133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21104133 is a deficient number, since it is larger than the sum of its proper divisors (8258235).

21104133 is a wasteful number, since it uses less digits than its factorization.

21104133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305883.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 21104133 is about 4593.9234865200. The cubic root of 21104133 is about 276.3476898346.

Adding to 21104133 its reverse (33140112), we get a palindrome (54244245).

The spelling of 21104133 in words is "twenty-one million, one hundred four thousand, one hundred thirty-three".