18895099887 has 6 divisors (see below), whose sum is σ = 27292922072. Its totient is φ = 12596733252.

The previous prime is 18895099831. The next prime is 18895099903. The reversal of 18895099887 is 78899059881.

It is not a de Polignac number, because 18895099887 - 2⁶ = 18895099823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18895099387) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1049727763 + ... + 1049727780.

Almost surely, 2^18895099887 is an apocalyptic number.

18895099887 is a deficient number, since it is larger than the sum of its proper divisors (8397822185).

18895099887 is a wasteful number, since it uses less digits than its factorization.

18895099887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099455549 (or 2099455546 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 72.

The spelling of 18895099887 in words is "eighteen billion, eight hundred ninety-five million, ninety-nine thousand, eight hundred eighty-seven".