21373330013689 has 2 divisors, whose sum is σ = 21373330013690. Its totient is φ = 21373330013688.

The previous prime is 21373330013683. The next prime is 21373330013699. The reversal of 21373330013689 is 98631003337312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20315600042089 + 1057729971600 = 4507283^2 + 1028460^2 .

It is a cyclic number.

It is not a de Polignac number, because 21373330013689 - 2¹⁷ = 21373329882617 is a prime.

It is not a weakly prime, because it can be changed into another prime (21373330013683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10686665006844 + 10686665006845.

It is an arithmetic number, because the mean of its divisors is an integer number (10686665006845).

Almost surely, 2^{21373330013689} is an apocalyptic number.

It is an amenable number.

21373330013689 is a deficient number, since it is larger than the sum of its proper divisors (1).

21373330013689 is an equidigital number, since it uses as much as digits as its factorization.

21373330013689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 49.

The spelling of 21373330013689 in words is "twenty-one trillion, three hundred seventy-three billion, three hundred thirty million, thirteen thousand, six hundred eighty-nine".