18689098681 has 24 divisors (see below), whose sum is σ = 21415613184. Its totient is φ = 16278900000.

The previous prime is 18689098679. The next prime is 18689098717.

18689098681 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18689098681 - 2¹ = 18689098679 is a prime.

It is a super-2 number, since 2×18689098681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18689093681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354186 + ... + 403516.

It is an arithmetic number, because the mean of its divisors is an integer number (892317216).

Almost surely, 2^18689098681 is an apocalyptic number.

18689098681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18689098681 is a deficient number, since it is larger than the sum of its proper divisors (2726514503).

18689098681 is a wasteful number, since it uses less digits than its factorization.

18689098681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49485 (or 49474 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 64.

The spelling of 18689098681 in words is "eighteen billion, six hundred eighty-nine million, ninety-eight thousand, six hundred eighty-one".