21483317 has 2 divisors, whose sum is σ = 21483318. Its totient is φ = 21483316.

The previous prime is 21483307. The next prime is 21483337. The reversal of 21483317 is 71338412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15062161 + 6421156 = 3881^2 + 2534^2 .

It is a cyclic number.

It is not a de Polignac number, because 21483317 - 2¹² = 21479221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21483317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21483307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10741658 + 10741659.

It is an arithmetic number, because the mean of its divisors is an integer number (10741659).

Almost surely, 2^21483317 is an apocalyptic number.

It is an amenable number.

21483317 is a deficient number, since it is larger than the sum of its proper divisors (1).

21483317 is an equidigital number, since it uses as much as digits as its factorization.

21483317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 21483317 is about 4635.0099244770. The cubic root of 21483317 is about 277.9929479087.

The spelling of 21483317 in words is "twenty-one million, four hundred eighty-three thousand, three hundred seventeen".