18751992858 has 64 divisors (see below), whose sum is σ = 42895681920. Its totient is φ = 6069413376.

The previous prime is 18751992827. The next prime is 18751992871. The reversal of 18751992858 is 85829915781.

It is a super-2 number, since 2×18751992858² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18751992795 and 18751992804.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 243841 + ... + 311387.

It is an arithmetic number, because the mean of its divisors is an integer number (670245030).

Almost surely, 2^18751992858 is an apocalyptic number.

18751992858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18751992858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21447840960).

18751992858 is an abundant number, since it is smaller than the sum of its proper divisors (24143689062).

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

18751992858 is a wasteful number, since it uses less digits than its factorization.

18751992858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67708 (or 67702 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 63.

The spelling of 18751992858 in words is "eighteen billion, seven hundred fifty-one million, nine hundred ninety-two thousand, eight hundred fifty-eight".