21066295 has 8 divisors (see below), whose sum is σ = 25346880. Its totient is φ = 16808160.

The previous prime is 21066271. The next prime is 21066299. The reversal of 21066295 is 59266012.

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

It is not a de Polignac number, because 21066295 - 2⁵ = 21066263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21066299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3471 + ... + 7360.

It is an arithmetic number, because the mean of its divisors is an integer number (3168360).

Almost surely, 2^21066295 is an apocalyptic number.

21066295 is a deficient number, since it is larger than the sum of its proper divisors (4280585).

21066295 is a wasteful number, since it uses less digits than its factorization.

21066295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11225.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 21066295 is about 4589.8033726947. The cubic root of 21066295 is about 276.1824346955.

The spelling of 21066295 in words is "twenty-one million, sixty-six thousand, two hundred ninety-five".