21083253587824 has 80 divisors (see below), whose sum is σ = 42102025297920. Its totient is φ = 10221390558720.

The previous prime is 21083253587821. The next prime is 21083253587843. The reversal of 21083253587824 is 42878535238012.

It is a happy number.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1128704917 + ... + 1128723595.

It is an arithmetic number, because the mean of its divisors is an integer number (526275316224).

Almost surely, 2^{21083253587824} is an apocalyptic number.

It is an amenable number.

21083253587824 is a deficient number, since it is larger than the sum of its proper divisors (21018771710096).

21083253587824 is a wasteful number, since it uses less digits than its factorization.

21083253587824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29198 (or 29192 counting only the distinct ones).

The product of its (nonzero) digits is 25804800, while the sum is 58.

The spelling of 21083253587824 in words is "twenty-one trillion, eighty-three billion, two hundred fifty-three million, five hundred eighty-seven thousand, eight hundred twenty-four".