18717142892 has 36 divisors (see below), whose sum is σ = 38495606184. Its totient is φ = 7938927360.

The previous prime is 18717142889. The next prime is 18717142903. The reversal of 18717142892 is 29824171781.

It is a super-2 number, since 2×18717142892² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18717142892.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 473234 + ... + 511257.

It is an arithmetic number, because the mean of its divisors is an integer number (1069322394).

Almost surely, 2^18717142892 is an apocalyptic number.

It is an amenable number.

18717142892 is an abundant number, since it is smaller than the sum of its proper divisors (19778463292).

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

18717142892 is a wasteful number, since it uses less digits than its factorization.

18717142892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984606 (or 984597 counting only the distinct ones).

The product of its digits is 451584, while the sum is 50.

The spelling of 18717142892 in words is "eighteen billion, seven hundred seventeen million, one hundred forty-two thousand, eight hundred ninety-two".