21376105 has 8 divisors (see below), whose sum is σ = 25900992. Its totient is φ = 16934448.

The previous prime is 21376093. The next prime is 21376133. The reversal of 21376105 is 50167312.

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 21376105 - 2⁵ = 21376073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21376105.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20239 + ... + 21268.

It is an arithmetic number, because the mean of its divisors is an integer number (3237624).

Almost surely, 2^21376105 is an apocalyptic number.

It is an amenable number.

21376105 is a deficient number, since it is larger than the sum of its proper divisors (4524887).

21376105 is a wasteful number, since it uses less digits than its factorization.

21376105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41615.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 21376105 is about 4623.4300037959. The cubic root of 21376105 is about 277.5297373645.

The spelling of 21376105 in words is "twenty-one million, three hundred seventy-six thousand, one hundred five".