13540689018 has 12 divisors (see below), whose sum is σ = 29338159578. Its totient is φ = 4513563000.

The previous prime is 13540688981. The next prime is 13540689037. The reversal of 13540689018 is 81098604531.

13540689018 is a `hidden beast` number, since 1 + 3 + 540 + 6 + 8 + 90 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9464760369 + 4075928649 = 97287^2 + 63843^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 376130233 + ... + 376130268.

Almost surely, 2^13540689018 is an apocalyptic number.

13540689018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13540689018 is an abundant number, since it is smaller than the sum of its proper divisors (15797470560).

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

13540689018 is a wasteful number, since it uses less digits than its factorization.

13540689018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752260509 (or 752260506 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 13540689018 in words is "thirteen billion, five hundred forty million, six hundred eighty-nine thousand, eighteen".