21733274681 has 8 divisors (see below), whose sum is σ = 21836289384. Its totient is φ = 21630343680.

The previous prime is 21733274663. The next prime is 21733274723. The reversal of 21733274681 is 18647233712.

It can be written as a sum of positive squares in 4 ways, for example, as 43349056 + 21689925625 = 6584^2 + 147275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21733274681 - 2²² = 21729080377 is a prime.

It is a super-2 number, since 2×21733274681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21733274281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534221 + ... + 573461.

It is an arithmetic number, because the mean of its divisors is an integer number (2729536173).

Almost surely, 2^21733274681 is an apocalyptic number.

It is an amenable number.

21733274681 is a deficient number, since it is larger than the sum of its proper divisors (103014703).

21733274681 is a wasteful number, since it uses less digits than its factorization.

21733274681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41851.

The product of its digits is 338688, while the sum is 44.

The spelling of 21733274681 in words is "twenty-one billion, seven hundred thirty-three million, two hundred seventy-four thousand, six hundred eighty-one".