21086033 has 8 divisors (see below), whose sum is σ = 21686400. Its totient is φ = 20492080.

The previous prime is 21086027. The next prime is 21086089. The reversal of 21086033 is 33068012.

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 21086033 - 2⁴ = 21086017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21086003) 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, 5498 + ... + 8508.

It is an arithmetic number, because the mean of its divisors is an integer number (2710800).

Almost surely, 2^21086033 is an apocalyptic number.

It is an amenable number.

21086033 is a deficient number, since it is larger than the sum of its proper divisors (600367).

21086033 is a wasteful number, since it uses less digits than its factorization.

21086033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3207.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 21086033 is about 4591.9530703177. The cubic root of 21086033 is about 276.2686638633.

The spelling of 21086033 in words is "twenty-one million, eighty-six thousand, thirty-three".