21104854 has 8 divisors (see below), whose sum is σ = 33519528. Its totient is φ = 9931680.

The previous prime is 21104851. The next prime is 21104857. The reversal of 21104854 is 45840112.

It is an interprime number because it is at equal distance from previous prime (21104851) and next prime (21104857).

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

It is a super-2 number, since 2×21104854² = 890829724722632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21104851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310332 + ... + 310399.

It is an arithmetic number, because the mean of its divisors is an integer number (4189941).

Almost surely, 2^21104854 is an apocalyptic number.

21104854 is a deficient number, since it is larger than the sum of its proper divisors (12414674).

21104854 is a wasteful number, since it uses less digits than its factorization.

21104854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620750.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 21104854 is about 4594.0019590766. The cubic root of 21104854 is about 276.3508368393.

Adding to 21104854 its reverse (45840112), we get a palindrome (66944966).

The spelling of 21104854 in words is "twenty-one million, one hundred four thousand, eight hundred fifty-four".