18103727540 has 12 divisors (see below), whose sum is σ = 38017827876. Its totient is φ = 7241491008.

The previous prime is 18103727539. The next prime is 18103727557. The reversal of 18103727540 is 4572730181.

It can be written as a sum of positive squares in 2 ways, for example, as 10921504036 + 7182223504 = 104506^2 + 84748^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18103727494 and 18103727503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452593169 + ... + 452593208.

It is an arithmetic number, because the mean of its divisors is an integer number (3168152323).

Almost surely, 2^18103727540 is an apocalyptic number.

18103727540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18103727540 is an abundant number, since it is smaller than the sum of its proper divisors (19914100336).

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

18103727540 is a wasteful number, since it uses less digits than its factorization.

18103727540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905186386 (or 905186384 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The spelling of 18103727540 in words is "eighteen billion, one hundred three million, seven hundred twenty-seven thousand, five hundred forty".