18703404240 has 40 divisors (see below), whose sum is σ = 57980553888. Its totient is φ = 4987574400.

The previous prime is 18703404211. The next prime is 18703404253. The reversal of 18703404240 is 4240430781.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 38965186 + ... + 38965665.

Almost surely, 2^18703404240 is an apocalyptic number.

18703404240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18703404240 is an abundant number, since it is smaller than the sum of its proper divisors (39277149648).

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

18703404240 is a wasteful number, since it uses less digits than its factorization.

18703404240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77930867 (or 77930861 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The spelling of 18703404240 in words is "eighteen billion, seven hundred three million, four hundred four thousand, two hundred forty".