21083253587823 has 64 divisors (see below), whose sum is σ = 34324103116800. Its totient is φ = 11236769390592.

The previous prime is 21083253587821. The next prime is 21083253587843. The reversal of 21083253587823 is 32878535238012.

It is a happy number.

It is not a de Polignac number, because 21083253587823 - 2¹ = 21083253587821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21083253587821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22574886 + ... + 23490252.

It is an arithmetic number, because the mean of its divisors is an integer number (536314111200).

Almost surely, 2^{21083253587823} is an apocalyptic number.

21083253587823 is a deficient number, since it is larger than the sum of its proper divisors (13240849528977).

21083253587823 is a wasteful number, since it uses less digits than its factorization.

21083253587823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915976.

The product of its (nonzero) digits is 19353600, while the sum is 57.

The spelling of 21083253587823 in words is "twenty-one trillion, eighty-three billion, two hundred fifty-three million, five hundred eighty-seven thousand, eight hundred twenty-three".