21848579 has 2 divisors, whose sum is σ = 21848580. Its totient is φ = 21848578.

The previous prime is 21848527. The next prime is 21848581. The reversal of 21848579 is 97584812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21848579 - 2¹² = 21844483 is a prime.

Together with 21848581, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21848509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10924289 + 10924290.

It is an arithmetic number, because the mean of its divisors is an integer number (10924290).

Almost surely, 2^21848579 is an apocalyptic number.

21848579 is a deficient number, since it is larger than the sum of its proper divisors (1).

21848579 is an equidigital number, since it uses as much as digits as its factorization.

21848579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 44.

The square root of 21848579 is about 4674.2463563659. The cubic root of 21848579 is about 279.5595925173.

The spelling of 21848579 in words is "twenty-one million, eight hundred forty-eight thousand, five hundred seventy-nine".