18885585108 has 48 divisors (see below), whose sum is σ = 49519403136. Its totient is φ = 5558298240.

The previous prime is 18885585101. The next prime is 18885585127. The reversal of 18885585108 is 80158558881.

It is a happy number.

It is a super-2 number, since 2×18885585108² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18885585101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2628183 + ... + 2635358.

It is an arithmetic number, because the mean of its divisors is an integer number (1031654232).

Almost surely, 2^18885585108 is an apocalyptic number.

It is an amenable number.

18885585108 is an abundant number, since it is smaller than the sum of its proper divisors (30633818028).

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

18885585108 is a wasteful number, since it uses less digits than its factorization.

18885585108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263584 (or 5263582 counting only the distinct ones).

The product of its (nonzero) digits is 4096000, while the sum is 57.

The spelling of 18885585108 in words is "eighteen billion, eight hundred eighty-five million, five hundred eighty-five thousand, one hundred eight".