21367105 has 8 divisors (see below), whose sum is σ = 25949952. Its totient is φ = 16887408.

The previous prime is 21367067. The next prime is 21367111. The reversal of 21367105 is 50176312.

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 21367105 - 2⁹ = 21366593 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 21367105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25329 + ... + 26158.

It is an arithmetic number, because the mean of its divisors is an integer number (3243744).

Almost surely, 2^21367105 is an apocalyptic number.

It is an amenable number.

21367105 is a deficient number, since it is larger than the sum of its proper divisors (4582847).

21367105 is an equidigital number, since it uses as much as digits as its factorization.

21367105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51575.

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

The square root of 21367105 is about 4622.4565979574. The cubic root of 21367105 is about 277.4907823684.

The spelling of 21367105 in words is "twenty-one million, three hundred sixty-seven thousand, one hundred five".