21752587733 has 2 divisors, whose sum is σ = 21752587734. Its totient is φ = 21752587732.

The previous prime is 21752587721. The next prime is 21752587751. The reversal of 21752587733 is 33778525712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20125110769 + 1627476964 = 141863^2 + 40342^2 .

It is a cyclic number.

It is not a de Polignac number, because 21752587733 - 2²⁰ = 21751539157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21752587333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10876293866 + 10876293867.

It is an arithmetic number, because the mean of its divisors is an integer number (10876293867).

Almost surely, 2^21752587733 is an apocalyptic number.

It is an amenable number.

21752587733 is a deficient number, since it is larger than the sum of its proper divisors (1).

21752587733 is an equidigital number, since it uses as much as digits as its factorization.

21752587733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2469600, while the sum is 50.

The spelling of 21752587733 in words is "twenty-one billion, seven hundred fifty-two million, five hundred eighty-seven thousand, seven hundred thirty-three".