21733339356 has 72 divisors (see below), whose sum is σ = 55929073200. Its totient is φ = 7113899520.

The previous prime is 21733339349. The next prime is 21733339361. The reversal of 21733339356 is 65393333712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2138046 + ... + 2148186.

Almost surely, 2^21733339356 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 21733339356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27964536600).

21733339356 is an abundant number, since it is smaller than the sum of its proper divisors (34195733844).

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

21733339356 is a wasteful number, since it uses less digits than its factorization.

21733339356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11219 (or 11214 counting only the distinct ones).

The product of its digits is 918540, while the sum is 45.

The spelling of 21733339356 in words is "twenty-one billion, seven hundred thirty-three million, three hundred thirty-nine thousand, three hundred fifty-six".