21082383 has 32 divisors (see below), whose sum is σ = 35909120. Its totient is φ = 11975040.

The previous prime is 21082361. The next prime is 21082403. The reversal of 21082383 is 38328012.

It is not a de Polignac number, because 21082383 - 2⁵ = 21082351 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21082183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62391 + ... + 62727.

It is an arithmetic number, because the mean of its divisors is an integer number (1122160).

Almost surely, 2^21082383 is an apocalyptic number.

21082383 is a deficient number, since it is larger than the sum of its proper divisors (14826737).

21082383 is a wasteful number, since it uses less digits than its factorization.

21082383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 21082383 is about 4591.5556187419. Note that the first 3 decimals coincide. The cubic root of 21082383 is about 276.2527222079.

The spelling of 21082383 in words is "twenty-one million, eighty-two thousand, three hundred eighty-three".