13500000018 has 48 divisors (see below), whose sum is σ = 30444448320. Its totient is φ = 4318144992.

The previous prime is 13499999987. The next prime is 13500000037. The reversal of 13500000018 is 81000000531.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5755 + ... + 164417.

It is an arithmetic number, because the mean of its divisors is an integer number (634259340).

Almost surely, 2^13500000018 is an apocalyptic number.

13500000018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13500000018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15222224160).

13500000018 is an abundant number, since it is smaller than the sum of its proper divisors (16944448302).

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

13500000018 is a wasteful number, since it uses less digits than its factorization.

13500000018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158863 (or 158860 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 13500000018 its reverse (81000000531), we get a palindrome (94500000549).

The spelling of 13500000018 in words is "thirteen billion, five hundred million, eighteen", and thus it is an aban number.