21484089 has 16 divisors (see below), whose sum is σ = 34722240. Its totient is φ = 13020480.

The previous prime is 21484069. The next prime is 21484097. The reversal of 21484089 is 98048412.

It is not a de Polignac number, because 21484089 - 2²⁴ = 4706873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21484069) 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 in 15 ways as a sum of consecutive naturals, for example, 35872 + ... + 36465.

It is an arithmetic number, because the mean of its divisors is an integer number (2170140).

Almost surely, 2^21484089 is an apocalyptic number.

It is an amenable number.

21484089 is a deficient number, since it is larger than the sum of its proper divisors (13238151).

21484089 is a wasteful number, since it uses less digits than its factorization.

21484089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72357 (or 72351 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 21484089 is about 4635.0932029464. The cubic root of 21484089 is about 277.9962777481.

The spelling of 21484089 in words is "twenty-one million, four hundred eighty-four thousand, eighty-nine".