18140858540 has 48 divisors (see below), whose sum is σ = 45431027712. Its totient is φ = 5949299136.

The previous prime is 18140858539. The next prime is 18140858543. The reversal of 18140858540 is 4585804181.

It is a junction number, because it is equal to n+sod(n) for n = 18140858491 and 18140858500.

It is not an unprimeable number, because it can be changed into a prime (18140858543) 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, 2813684 + ... + 2820123.

It is an arithmetic number, because the mean of its divisors is an integer number (946479744).

Almost surely, 2^18140858540 is an apocalyptic number.

18140858540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18140858540 is an abundant number, since it is smaller than the sum of its proper divisors (27290169172).

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

18140858540 is a wasteful number, since it uses less digits than its factorization.

18140858540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5633846 (or 5633844 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 44.

The spelling of 18140858540 in words is "eighteen billion, one hundred forty million, eight hundred fifty-eight thousand, five hundred forty".