18489660460 has 96 divisors (see below), whose sum is σ = 40936089600. Its totient is φ = 7006072320.

The previous prime is 18489660451. The next prime is 18489660493. The reversal of 18489660460 is 6406698481.

It is a junction number, because it is equal to n+sod(n) for n = 18489660398 and 18489660407.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6289671 + ... + 6292609.

It is an arithmetic number, because the mean of its divisors is an integer number (426417600).

Almost surely, 2^18489660460 is an apocalyptic number.

18489660460 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 18489660460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20468044800).

18489660460 is an abundant number, since it is smaller than the sum of its proper divisors (22446429140).

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

18489660460 is a wasteful number, since it uses less digits than its factorization.

18489660460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191 (or 3189 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 18489660460 in words is "eighteen billion, four hundred eighty-nine million, six hundred sixty thousand, four hundred sixty".