18915058008 has 384 divisors, whose sum is σ = 68494118400. Its totient is φ = 4779129600.

The previous prime is 18915057943. The next prime is 18915058009. The reversal of 18915058008 is 80085051981.

18915058008 is a `hidden beast` number, since 18 + 9 + 1 + 50 + 580 + 0 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18915058009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4305493 + ... + 4309883.

It is an arithmetic number, because the mean of its divisors is an integer number (178370100).

Almost surely, 2^18915058008 is an apocalyptic number.

18915058008 is a gapful number since it is divisible by the number (18) 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 18915058008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34247059200).

18915058008 is an abundant number, since it is smaller than the sum of its proper divisors (49579060392).

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

18915058008 is a wasteful number, since it uses less digits than its factorization.

18915058008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468 (or 4451 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 45.

The spelling of 18915058008 in words is "eighteen billion, nine hundred fifteen million, fifty-eight thousand, eight".