20183347101721 has 2 divisors, whose sum is σ = 20183347101722. Its totient is φ = 20183347101720.

The previous prime is 20183347101649. The next prime is 20183347101851. The reversal of 20183347101721 is 12710174338102.

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., 19979657359321 + 203689742400 = 4469861^2 + 451320^2 .

It is a cyclic number.

It is not a de Polignac number, because 20183347101721 - 2³⁷ = 20045908148249 is a prime.

It is not a weakly prime, because it can be changed into another prime (20183347104721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10091673550860 + 10091673550861.

It is an arithmetic number, because the mean of its divisors is an integer number (10091673550861).

Almost surely, 2^{20183347101721} is an apocalyptic number.

It is an amenable number.

20183347101721 is a deficient number, since it is larger than the sum of its proper divisors (1).

20183347101721 is an equidigital number, since it uses as much as digits as its factorization.

20183347101721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The spelling of 20183347101721 in words is "twenty trillion, one hundred eighty-three billion, three hundred forty-seven million, one hundred one thousand, seven hundred twenty-one".