18808125501858 has 128 divisors (see below), whose sum is σ = 48071010484224. Its totient is φ = 4763201587200.

The previous prime is 18808125501821. The next prime is 18808125502003. The reversal of 18808125501858 is 85810552180881.

It is a super-2 number, since 2×18808125501858² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31202010 + ... + 31799082.

It is an arithmetic number, because the mean of its divisors is an integer number (375554769408).

Almost surely, 2^{18808125501858} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18808125501858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24035505242112).

18808125501858 is an abundant number, since it is smaller than the sum of its proper divisors (29262884982366).

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

18808125501858 is a wasteful number, since it uses less digits than its factorization.

18808125501858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598800.

The product of its (nonzero) digits is 8192000, while the sum is 60.

The spelling of 18808125501858 in words is "eighteen trillion, eight hundred eight billion, one hundred twenty-five million, five hundred one thousand, eight hundred fifty-eight".