21182065 has 8 divisors (see below), whose sum is σ = 25473600. Its totient is φ = 16908912.

The previous prime is 21182009. The next prime is 21182107. The reversal of 21182065 is 56028112.

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 21182065 - 2⁹ = 21181553 is a prime.

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, 1915 + ... + 6784.

It is an arithmetic number, because the mean of its divisors is an integer number (3184200).

Almost surely, 2^21182065 is an apocalyptic number.

It is an amenable number.

21182065 is a deficient number, since it is larger than the sum of its proper divisors (4291535).

21182065 is an equidigital number, since it uses as much as digits as its factorization.

21182065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9191.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 21182065 is about 4602.3977446544. The cubic root of 21182065 is about 276.6874317087.

The spelling of 21182065 in words is "twenty-one million, one hundred eighty-two thousand, sixty-five".