18717034140 has 216 divisors, whose sum is σ = 68482159200. Its totient is φ = 4052913408.

The previous prime is 18717034099. The next prime is 18717034151. The reversal of 18717034140 is 4143071781.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18717034095 and 18717034104.

It is a congruent number.

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 71 ways as a sum of consecutive naturals, for example, 434286 + ... + 475434.

Almost surely, 2^18717034140 is an apocalyptic number.

18717034140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18717034140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34241079600).

18717034140 is an abundant number, since it is smaller than the sum of its proper divisors (49765125060).

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

18717034140 is a wasteful number, since it uses less digits than its factorization.

18717034140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41209 (or 41185 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The spelling of 18717034140 in words is "eighteen billion, seven hundred seventeen million, thirty-four thousand, one hundred forty".