21783113509596 has 24 divisors (see below), whose sum is σ = 50827474509840. Its totient is φ = 7261007885952.

The previous prime is 21783113509571. The next prime is 21783113509607. The reversal of 21783113509596 is 69590531138712.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608361 + ... + 6628448.

It is an arithmetic number, because the mean of its divisors is an integer number (2117811437910).

Almost surely, 2^{21783113509596} is an apocalyptic number.

It is an amenable number.

21783113509596 is an abundant number, since it is smaller than the sum of its proper divisors (29044361000244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21783113509596 is a wasteful number, since it uses less digits than its factorization.

21783113509596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7487653 (or 7487651 counting only the distinct ones).

The product of its (nonzero) digits is 12247200, while the sum is 60.

The spelling of 21783113509596 in words is "twenty-one trillion, seven hundred eighty-three billion, one hundred thirteen million, five hundred nine thousand, five hundred ninety-six".