18540111619 has 2 divisors, whose sum is σ = 18540111620. Its totient is φ = 18540111618.

The previous prime is 18540111613. The next prime is 18540111659. The reversal of 18540111619 is 91611104581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18540111619 - 2¹¹ = 18540109571 is a prime.

It is a super-3 number, since 3×18540111619³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (18540111613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9270055809 + 9270055810.

It is an arithmetic number, because the mean of its divisors is an integer number (9270055810).

Almost surely, 2^18540111619 is an apocalyptic number.

18540111619 is a deficient number, since it is larger than the sum of its proper divisors (1).

18540111619 is an equidigital number, since it uses as much as digits as its factorization.

18540111619 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 37.

The spelling of 18540111619 in words is "eighteen billion, five hundred forty million, one hundred eleven thousand, six hundred nineteen".