21733131312 has 120 divisors (see below), whose sum is σ = 63580375040. Its totient is φ = 6921832320.

The previous prime is 21733131289. The next prime is 21733131331. The reversal of 21733131312 is 21313133712.

It is a happy number.

21733131312 is a `hidden beast` number, since 2 + 1 + 7 + 331 + 313 + 12 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321843 + ... + 383469.

Almost surely, 2^21733131312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21733131312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31790187520).

21733131312 is an abundant number, since it is smaller than the sum of its proper divisors (41847243728).

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

21733131312 is a wasteful number, since it uses less digits than its factorization.

21733131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61751 (or 61742 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The spelling of 21733131312 in words is "twenty-one billion, seven hundred thirty-three million, one hundred thirty-one thousand, three hundred twelve".