17238993220391 has 2 divisors, whose sum is σ = 17238993220392. Its totient is φ = 17238993220390.

The previous prime is 17238993220387. The next prime is 17238993220447. The reversal of 17238993220391 is 19302239983271.

It is a happy number.

17238993220391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17238993220391 - 2² = 17238993220387 is a prime.

It is a super-2 number, since 2×17238993220391² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 17238993220391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17238993226391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8619496610195 + 8619496610196.

It is an arithmetic number, because the mean of its divisors is an integer number (8619496610196).

Almost surely, 2^{17238993220391} is an apocalyptic number.

17238993220391 is a deficient number, since it is larger than the sum of its proper divisors (1).

17238993220391 is an equidigital number, since it uses as much as digits as its factorization.

17238993220391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8817984, while the sum is 59.

The spelling of 17238993220391 in words is "seventeen trillion, two hundred thirty-eight billion, nine hundred ninety-three million, two hundred twenty thousand, three hundred ninety-one".