18751068019 has 2 divisors, whose sum is σ = 18751068020. Its totient is φ = 18751068018.

The previous prime is 18751067999. The next prime is 18751068047. The reversal of 18751068019 is 91086015781.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18751068019 is a prime.

It is a super-2 number, since 2×18751068019² (a number of 21 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 18751068019.

It is not a weakly prime, because it can be changed into another prime (18751068319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9375534009 + 9375534010.

It is an arithmetic number, because the mean of its divisors is an integer number (9375534010).

Almost surely, 2^18751068019 is an apocalyptic number.

18751068019 is a deficient number, since it is larger than the sum of its proper divisors (1).

18751068019 is an equidigital number, since it uses as much as digits as its factorization.

18751068019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 46.

The spelling of 18751068019 in words is "eighteen billion, seven hundred fifty-one million, sixty-eight thousand, nineteen".