21104318 has 8 divisors (see below), whose sum is σ = 31677048. Its totient is φ = 10545304.

The previous prime is 21104311. The next prime is 21104323. The reversal of 21104318 is 81340112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21104318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2405 + ... + 6927.

It is an arithmetic number, because the mean of its divisors is an integer number (3959631).

Almost surely, 2^21104318 is an apocalyptic number.

21104318 is a deficient number, since it is larger than the sum of its proper divisors (10572730).

21104318 is a wasteful number, since it uses less digits than its factorization.

21104318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6858.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 21104318 is about 4593.9436217699. The cubic root of 21104318 is about 276.3484973253.

The spelling of 21104318 in words is "twenty-one million, one hundred four thousand, three hundred eighteen".