18519503500 has 48 divisors (see below), whose sum is σ = 41050350432. Its totient is φ = 7297224000.

The previous prime is 18519503489. The next prime is 18519503507. The reversal of 18519503500 is 530591581.

It is a self number, because there is not a number n which added to its sum of digits gives 18519503500.

It is not an unprimeable number, because it can be changed into a prime (18519503507) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 242911 + ... + 309910.

It is an arithmetic number, because the mean of its divisors is an integer number (855215634).

Almost surely, 2^18519503500 is an apocalyptic number.

18519503500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18519503500 is an abundant number, since it is smaller than the sum of its proper divisors (22530846932).

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

18519503500 is a wasteful number, since it uses less digits than its factorization.

18519503500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552907 (or 552895 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 37.

The spelling of 18519503500 in words is "eighteen billion, five hundred nineteen million, five hundred three thousand, five hundred".