18019680840 has 192 divisors, whose sum is σ = 67268448000. Its totient is φ = 4097972736.

The previous prime is 18019680799. The next prime is 18019680853. The reversal of 18019680840 is 4808691081.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 483514 + ... + 519446.

It is an arithmetic number, because the mean of its divisors is an integer number (350356500).

Almost surely, 2^18019680840 is an apocalyptic number.

18019680840 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 18019680840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33634224000).

18019680840 is an abundant number, since it is smaller than the sum of its proper divisors (49248767160).

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

18019680840 is a wasteful number, since it uses less digits than its factorization.

18019680840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36156 (or 36149 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The spelling of 18019680840 in words is "eighteen billion, nineteen million, six hundred eighty thousand, eight hundred forty".