21848243 has 8 divisors (see below), whose sum is σ = 22569408. Its totient is φ = 21138624.

The previous prime is 21848221. The next prime is 21848249. The reversal of 21848243 is 34284812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21848243 - 2¹⁶ = 21782707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21848249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046 + ... + 6692.

It is an arithmetic number, because the mean of its divisors is an integer number (2821176).

Almost surely, 2^21848243 is an apocalyptic number.

21848243 is a deficient number, since it is larger than the sum of its proper divisors (721165).

21848243 is an equidigital number, since it uses as much as digits as its factorization.

21848243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5773.

The product of its digits is 12288, while the sum is 32.

The square root of 21848243 is about 4674.2104146048. The cubic root of 21848243 is about 279.5581594340.

The spelling of 21848243 in words is "twenty-one million, eight hundred forty-eight thousand, two hundred forty-three".