21750532876801 has 2 divisors, whose sum is σ = 21750532876802. Its totient is φ = 21750532876800.

The previous prime is 21750532876789. The next prime is 21750532876859. The reversal of 21750532876801 is 10867823505712.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18337365306225 + 3413167570576 = 4282215^2 + 1847476^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21750532876801 is a prime.

It is not a weakly prime, because it can be changed into another prime (21750532876861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10875266438400 + 10875266438401.

It is an arithmetic number, because the mean of its divisors is an integer number (10875266438401).

Almost surely, 2^{21750532876801} is an apocalyptic number.

It is an amenable number.

21750532876801 is a deficient number, since it is larger than the sum of its proper divisors (1).

21750532876801 is an equidigital number, since it uses as much as digits as its factorization.

21750532876801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5644800, while the sum is 55.

The spelling of 21750532876801 in words is "twenty-one trillion, seven hundred fifty billion, five hundred thirty-two million, eight hundred seventy-six thousand, eight hundred one".