21848085 has 48 divisors (see below), whose sum is σ = 44313984. Its totient is φ = 9749376.

The previous prime is 21848083. The next prime is 21848089. The reversal of 21848085 is 58084812.

It is not a de Polignac number, because 21848085 - 2¹ = 21848083 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21848083) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12739 + ... + 14351.

It is an arithmetic number, because the mean of its divisors is an integer number (923208).

Almost surely, 2^21848085 is an apocalyptic number.

It is an amenable number.

21848085 is an abundant number, since it is smaller than the sum of its proper divisors (22465899).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21848085 is a wasteful number, since it uses less digits than its factorization.

21848085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674 (or 1671 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 21848085 is about 4674.1935133240. The cubic root of 21848085 is about 279.5574855385.

The spelling of 21848085 in words is "twenty-one million, eight hundred forty-eight thousand, eighty-five".