17920136771 has 2 divisors, whose sum is σ = 17920136772. Its totient is φ = 17920136770.

The previous prime is 17920136749. The next prime is 17920136783. The reversal of 17920136771 is 17763102971.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (17763102971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17920136771 - 2¹⁸ = 17919874627 is a prime.

It is a super-2 number, since 2×17920136771² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (17920136791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8960068385 + 8960068386.

It is an arithmetic number, because the mean of its divisors is an integer number (8960068386).

Almost surely, 2^17920136771 is an apocalyptic number.

17920136771 is a deficient number, since it is larger than the sum of its proper divisors (1).

17920136771 is an equidigital number, since it uses as much as digits as its factorization.

17920136771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 111132, while the sum is 44.

The spelling of 17920136771 in words is "seventeen billion, nine hundred twenty million, one hundred thirty-six thousand, seven hundred seventy-one".