18283778172371 has 2 divisors, whose sum is σ = 18283778172372. Its totient is φ = 18283778172370.

The previous prime is 18283778172367. The next prime is 18283778172383. The reversal of 18283778172371 is 17327187738281.

It is a weak prime.

It is an emirp because it is prime and its reverse (17327187738281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18283778172371 - 2² = 18283778172367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18283778172298 and 18283778172307.

It is not a weakly prime, because it can be changed into another prime (18283778132371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9141889086185 + 9141889086186.

It is an arithmetic number, because the mean of its divisors is an integer number (9141889086186).

Almost surely, 2^{18283778172371} is an apocalyptic number.

18283778172371 is a deficient number, since it is larger than the sum of its proper divisors (1).

18283778172371 is an equidigital number, since it uses as much as digits as its factorization.

18283778172371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44255232, while the sum is 65.

The spelling of 18283778172371 in words is "eighteen trillion, two hundred eighty-three billion, seven hundred seventy-eight million, one hundred seventy-two thousand, three hundred seventy-one".