18781995059019 has 12 divisors (see below), whose sum is σ = 27398157810192. Its totient is φ = 12397356474000.

The previous prime is 18781995058999. The next prime is 18781995059029. The reversal of 18781995059019 is 91095059918781.

18781995059019 is a `hidden beast` number, since 1 + 8 + 7 + 8 + 19 + 9 + 5 + 0 + 590 + 19 = 666.

It is not a de Polignac number, because 18781995059019 - 2⁷ = 18781995058891 is a prime.

It is a super-2 number, since 2×18781995059019² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18781995059029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10331129487 + ... + 10331131304.

It is an arithmetic number, because the mean of its divisors is an integer number (2283179817516).

Almost surely, 2^{18781995059019} is an apocalyptic number.

18781995059019 is a deficient number, since it is larger than the sum of its proper divisors (8616162751173).

18781995059019 is a wasteful number, since it uses less digits than its factorization.

18781995059019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20662260898 (or 20662260895 counting only the distinct ones).

The product of its (nonzero) digits is 73483200, while the sum is 72.

The spelling of 18781995059019 in words is "eighteen trillion, seven hundred eighty-one billion, nine hundred ninety-five million, fifty-nine thousand, nineteen".