21083673 has 32 divisors (see below), whose sum is σ = 32771200. Its totient is φ = 11943936.

The previous prime is 21083669. The next prime is 21083719. The reversal of 21083673 is 37638012.

It is not a de Polignac number, because 21083673 - 2² = 21083669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21083673.

It is not an unprimeable number, because it can be changed into a prime (21083633) 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, 27033 + ... + 27801.

It is an arithmetic number, because the mean of its divisors is an integer number (1024100).

Almost surely, 2^21083673 is an apocalyptic number.

It is an amenable number.

21083673 is a deficient number, since it is larger than the sum of its proper divisors (11687527).

21083673 is a wasteful number, since it uses less digits than its factorization.

21083673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 21083673 is about 4591.6960918597. The cubic root of 21083673 is about 276.2583565922.

The spelling of 21083673 in words is "twenty-one million, eighty-three thousand, six hundred seventy-three".