21859483 has 2 divisors, whose sum is σ = 21859484. Its totient is φ = 21859482.

The previous prime is 21859477. The next prime is 21859507. The reversal of 21859483 is 38495812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21859483 - 2⁵ = 21859451 is a prime.

It is not a weakly prime, because it can be changed into another prime (21859403) 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 as a sum of consecutive naturals, namely, 10929741 + 10929742.

It is an arithmetic number, because the mean of its divisors is an integer number (10929742).

Almost surely, 2^21859483 is an apocalyptic number.

21859483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21859483 is an equidigital number, since it uses as much as digits as its factorization.

21859483 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 21859483 is about 4675.4126021133. The cubic root of 21859483 is about 279.6060915113.

The spelling of 21859483 in words is "twenty-one million, eight hundred fifty-nine thousand, four hundred eighty-three".