18136505140 has 48 divisors (see below), whose sum is σ = 41026406400. Its totient is φ = 6694922880.

The previous prime is 18136505117. The next prime is 18136505147. The reversal of 18136505140 is 4150563181.

It is a junction number, because it is equal to n+sod(n) for n = 18136505096 and 18136505105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18136505147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1788685 + ... + 1798795.

It is an arithmetic number, because the mean of its divisors is an integer number (854716800).

Almost surely, 2^18136505140 is an apocalyptic number.

18136505140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18136505140 is an abundant number, since it is smaller than the sum of its proper divisors (22889901260).

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

18136505140 is a wasteful number, since it uses less digits than its factorization.

18136505140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17032 (or 17030 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 18136505140 in words is "eighteen billion, one hundred thirty-six million, five hundred five thousand, one hundred forty".