21795701 has 8 divisors (see below), whose sum is σ = 22451160. Its totient is φ = 21143808.

The previous prime is 21795691. The next prime is 21795707. The reversal of 21795701 is 10759712.

It can be written as a sum of positive squares in 4 ways, for example, as 15288100 + 6507601 = 3910^2 + 2551^2 .

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 21795701 - 2⁶ = 21795637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21795707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16265 + ... + 17553.

It is an arithmetic number, because the mean of its divisors is an integer number (2806395).

Almost surely, 2^21795701 is an apocalyptic number.

It is an amenable number.

21795701 is a deficient number, since it is larger than the sum of its proper divisors (655459).

21795701 is a wasteful number, since it uses less digits than its factorization.

21795701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 21795701 is about 4668.5866169538. The cubic root of 21795701 is about 279.3338799925. Note that the first 3 decimals are identical.

The spelling of 21795701 in words is "twenty-one million, seven hundred ninety-five thousand, seven hundred one".