19871530118 has 32 divisors (see below), whose sum is σ = 32623147008. Its totient is φ = 9003103200.

The previous prime is 19871530117. The next prime is 19871530139. The reversal of 19871530118 is 81103517891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19871530117) 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, 13508123 + ... + 13509593.

It is an arithmetic number, because the mean of its divisors is an integer number (1019473344).

Almost surely, 2^19871530118 is an apocalyptic number.

19871530118 is a deficient number, since it is larger than the sum of its proper divisors (12751616890).

19871530118 is a wasteful number, since it uses less digits than its factorization.

19871530118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068.

The product of its (nonzero) digits is 60480, while the sum is 44.

The spelling of 19871530118 in words is "nineteen billion, eight hundred seventy-one million, five hundred thirty thousand, one hundred eighteen".