21859083 has 6 divisors (see below), whose sum is σ = 31574244. Its totient is φ = 14572716.

The previous prime is 21859073. The next prime is 21859091. The reversal of 21859083 is 38095812.

It is not a de Polignac number, because 21859083 - 2⁴ = 21859067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21859003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1214385 + ... + 1214402.

It is an arithmetic number, because the mean of its divisors is an integer number (5262374).

Almost surely, 2^21859083 is an apocalyptic number.

21859083 is a deficient number, since it is larger than the sum of its proper divisors (9715161).

21859083 is a wasteful number, since it uses less digits than its factorization.

21859083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428793 (or 2428790 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 21859083 is about 4675.3698249443. The cubic root of 21859083 is about 279.6043860254.

The spelling of 21859083 in words is "twenty-one million, eight hundred fifty-nine thousand, eighty-three".