18777895219 has 2 divisors, whose sum is σ = 18777895220. Its totient is φ = 18777895218.

The previous prime is 18777895217. The next prime is 18777895303. The reversal of 18777895219 is 91259877781.

It is a weak prime.

It is an emirp because it is prime and its reverse (91259877781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18777895219 - 2¹ = 18777895217 is a prime.

It is a super-2 number, since 2×18777895219² (a number of 21 digits) contains 22 as substring.

Together with 18777895217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18777895211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9388947609 + 9388947610.

It is an arithmetic number, because the mean of its divisors is an integer number (9388947610).

Almost surely, 2^18777895219 is an apocalyptic number.

18777895219 is a deficient number, since it is larger than the sum of its proper divisors (1).

18777895219 is an equidigital number, since it uses as much as digits as its factorization.

18777895219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17781120, while the sum is 64.

The spelling of 18777895219 in words is "eighteen billion, seven hundred seventy-seven million, eight hundred ninety-five thousand, two hundred nineteen".