18003869887 has 2 divisors, whose sum is σ = 18003869888. Its totient is φ = 18003869886.

The previous prime is 18003869879. The next prime is 18003869893. The reversal of 18003869887 is 78896830081.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18003869887 - 2³ = 18003869879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18003869687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9001934943 + 9001934944.

It is an arithmetic number, because the mean of its divisors is an integer number (9001934944).

Almost surely, 2^18003869887 is an apocalyptic number.

18003869887 is a deficient number, since it is larger than the sum of its proper divisors (1).

18003869887 is an equidigital number, since it uses as much as digits as its factorization.

18003869887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 18003869887 in words is "eighteen billion, three million, eight hundred sixty-nine thousand, eight hundred eighty-seven".