18123208460 has 96 divisors (see below), whose sum is σ = 44838033408. Its totient is φ = 6024395520.

The previous prime is 18123208427. The next prime is 18123208471. The reversal of 18123208460 is 6480232181.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 18123208460.

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, 691190 + ... + 716930.

It is an arithmetic number, because the mean of its divisors is an integer number (467062848).

Almost surely, 2^18123208460 is an apocalyptic number.

18123208460 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 18123208460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22419016704).

18123208460 is an abundant number, since it is smaller than the sum of its proper divisors (26714824948).

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

18123208460 is a wasteful number, since it uses less digits than its factorization.

18123208460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25911 (or 25909 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 18123208460 in words is "eighteen billion, one hundred twenty-three million, two hundred eight thousand, four hundred sixty".