18404081860 has 96 divisors (see below), whose sum is σ = 40667397120. Its totient is φ = 6986995200.

The previous prime is 18404081803. The next prime is 18404081897. The reversal of 18404081860 is 6818040481.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 22199926 + ... + 22200754.

It is an arithmetic number, because the mean of its divisors is an integer number (423618720).

Almost surely, 2^18404081860 is an apocalyptic number.

18404081860 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 18404081860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20333698560).

18404081860 is an abundant number, since it is smaller than the sum of its proper divisors (22263315260).

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

18404081860 is a wasteful number, since it uses less digits than its factorization.

18404081860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517 (or 1515 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The spelling of 18404081860 in words is "eighteen billion, four hundred four million, eighty-one thousand, eight hundred sixty".