18698089680 has 80 divisors (see below), whose sum is σ = 64404538560. Its totient is φ = 4986156672.

The previous prime is 18698089661. The next prime is 18698089769. The reversal of 18698089680 is 8698089681.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4326102 + ... + 4330421.

It is an arithmetic number, because the mean of its divisors is an integer number (805056732).

Almost surely, 2^18698089680 is an apocalyptic number.

18698089680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18698089680 is an abundant number, since it is smaller than the sum of its proper divisors (45706448880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18698089680 is a wasteful number, since it uses less digits than its factorization.

18698089680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8656545 (or 8656533 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 63.

Subtracting from 18698089680 its reverse (8698089681), we obtain a palindrome (9999999999).

The spelling of 18698089680 in words is "eighteen billion, six hundred ninety-eight million, eighty-nine thousand, six hundred eighty".