18558955008 has 480 divisors, whose sum is σ = 62413148160. Its totient is φ = 5399654400.

The previous prime is 18558955007. The next prime is 18558955013. The reversal of 18558955008 is 80055985581.

18558955008 is a `hidden beast` number, since 1 + 8 + 5 + 5 + 89 + 550 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18558955007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 146133441 + ... + 146133567.

It is an arithmetic number, because the mean of its divisors is an integer number (130027392).

Almost surely, 2^18558955008 is an apocalyptic number.

18558955008 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 18558955008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31206574080).

18558955008 is an abundant number, since it is smaller than the sum of its proper divisors (43854193152).

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

18558955008 is a wasteful number, since it uses less digits than its factorization.

18558955008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 54.

The spelling of 18558955008 in words is "eighteen billion, five hundred fifty-eight million, nine hundred fifty-five thousand, eight".