18486687620 has 48 divisors (see below), whose sum is σ = 39889656576. Its totient is φ = 7192416000.

The previous prime is 18486687619. The next prime is 18486687641. The reversal of 18486687620 is 2678668481.

It is a super-2 number, since 2×18486687620² (a number of 21 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 237365 + ... + 305475.

It is an arithmetic number, because the mean of its divisors is an integer number (831034512).

Almost surely, 2^18486687620 is an apocalyptic number.

18486687620 is a gapful number since it is divisible by the number (10) 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 18486687620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19944828288).

18486687620 is an abundant number, since it is smaller than the sum of its proper divisors (21402968956).

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

18486687620 is a wasteful number, since it uses less digits than its factorization.

18486687620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68492 (or 68490 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 56.

The spelling of 18486687620 in words is "eighteen billion, four hundred eighty-six million, six hundred eighty-seven thousand, six hundred twenty".