21831363312 has 80 divisors (see below), whose sum is σ = 62134058880. Its totient is φ = 6550048000.

The previous prime is 21831363311. The next prime is 21831363317. The reversal of 21831363312 is 21336313812.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21831363311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151362 + ... + 258017.

It is an arithmetic number, because the mean of its divisors is an integer number (776675736).

Almost surely, 2^21831363312 is an apocalyptic number.

21831363312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21831363312 is an abundant number, since it is smaller than the sum of its proper divisors (40302695568).

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

21831363312 is a wasteful number, since it uses less digits than its factorization.

21831363312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409502 (or 409496 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

It can be divided in two parts, 218313 and 63312, that added together give a triangular number (281625 = T₇₅₀).

The spelling of 21831363312 in words is "twenty-one billion, eight hundred thirty-one million, three hundred sixty-three thousand, three hundred twelve".