21795065 has 8 divisors (see below), whose sum is σ = 26189568. Its totient is φ = 17412400.

The previous prime is 21795043. The next prime is 21795079. The reversal of 21795065 is 56059712.

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

It is not a de Polignac number, because 21795065 - 2⁶ = 21795001 is a prime.

It is a super-3 number, since 3×21795065³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

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, 1790 + ... + 6840.

It is an arithmetic number, because the mean of its divisors is an integer number (3273696).

Almost surely, 2^21795065 is an apocalyptic number.

It is an amenable number.

21795065 is a deficient number, since it is larger than the sum of its proper divisors (4394503).

21795065 is an equidigital number, since it uses as much as digits as its factorization.

21795065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5919.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 21795065 is about 4668.5185016234. The cubic root of 21795065 is about 279.3311629724.

The spelling of 21795065 in words is "twenty-one million, seven hundred ninety-five thousand, sixty-five".