18315843084 has 432 divisors, whose sum is σ = 61509520800. Its totient is φ = 4576239360.

The previous prime is 18315843071. The next prime is 18315843137. The reversal of 18315843084 is 48034851381.

18315843084 is a `hidden beast` number, since 1 + 8 + 31 + 584 + 30 + 8 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 68088502 + ... + 68088770.

It is an arithmetic number, because the mean of its divisors is an integer number (142383150).

Almost surely, 2^18315843084 is an apocalyptic number.

18315843084 is a gapful number since it is divisible by the number (14) 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 18315843084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30754760400).

18315843084 is an abundant number, since it is smaller than the sum of its proper divisors (43193677716).

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

18315843084 is a wasteful number, since it uses less digits than its factorization.

18315843084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 18315843084 in words is "eighteen billion, three hundred fifteen million, eight hundred forty-three thousand, eighty-four".