18139648140 has 96 divisors (see below), whose sum is σ = 58254981120. Its totient is φ = 4681195200.

The previous prime is 18139648123. The next prime is 18139648151. The reversal of 18139648140 is 4184693181.

18139648140 is a `hidden beast` number, since 1 + 81 + 3 + 96 + 481 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 525066 + ... + 558545.

It is an arithmetic number, because the mean of its divisors is an integer number (606822720).

Almost surely, 2^18139648140 is an apocalyptic number.

18139648140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18139648140 is an abundant number, since it is smaller than the sum of its proper divisors (40115332980).

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

18139648140 is a wasteful number, since it uses less digits than its factorization.

18139648140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083660 (or 1083652 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 18139648140 in words is "eighteen billion, one hundred thirty-nine million, six hundred forty-eight thousand, one hundred forty".