18332998887 has 16 divisors (see below), whose sum is σ = 27938092032. Its totient is φ = 10475214240.

The previous prime is 18332998877. The next prime is 18332998949. The reversal of 18332998887 is 78889923381.

It is a happy number.

It is not a de Polignac number, because 18332998887 - 2²³ = 18324610279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18332998837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368713 + ... + 415469.

It is an arithmetic number, because the mean of its divisors is an integer number (1746130752).

Almost surely, 2^18332998887 is an apocalyptic number.

18332998887 is a deficient number, since it is larger than the sum of its proper divisors (9605093145).

18332998887 is a wasteful number, since it uses less digits than its factorization.

18332998887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65438.

The product of its digits is 41803776, while the sum is 66.

The spelling of 18332998887 in words is "eighteen billion, three hundred thirty-two million, nine hundred ninety-eight thousand, eight hundred eighty-seven".