21568483 has 2 divisors, whose sum is σ = 21568484. Its totient is φ = 21568482.

The previous prime is 21568471. The next prime is 21568493. The reversal of 21568483 is 38486512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21568483 - 2¹³ = 21560291 is a prime.

It is not a weakly prime, because it can be changed into another prime (21568433) 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, 10784241 + 10784242.

It is an arithmetic number, because the mean of its divisors is an integer number (10784242).

Almost surely, 2^21568483 is an apocalyptic number.

21568483 is a deficient number, since it is larger than the sum of its proper divisors (1).

21568483 is an equidigital number, since it uses as much as digits as its factorization.

21568483 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 37.

The square root of 21568483 is about 4644.1880883530. The cubic root of 21568483 is about 278.3598113463.

The spelling of 21568483 in words is "twenty-one million, five hundred sixty-eight thousand, four hundred eighty-three".