18668479928460 has 96 divisors (see below), whose sum is σ = 53692950178560. Its totient is φ = 4842950715648.

The previous prime is 18668479928453. The next prime is 18668479928467. The reversal of 18668479928460 is 6482997486681.

It is an interprime number because it is at equal distance from previous prime (18668479928453) and next prime (18668479928467).

It is not an unprimeable number, because it can be changed into a prime (18668479928467) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13502247 + ... + 14820513.

It is an arithmetic number, because the mean of its divisors is an integer number (559301564360).

Almost surely, 2^{18668479928460} is an apocalyptic number.

18668479928460 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 18668479928460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26846475089280).

18668479928460 is an abundant number, since it is smaller than the sum of its proper divisors (35024470250100).

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

18668479928460 is a wasteful number, since it uses less digits than its factorization.

18668479928460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324695 (or 1324693 counting only the distinct ones).

The product of its (nonzero) digits is 2006581248, while the sum is 78.

The spelling of 18668479928460 in words is "eighteen trillion, six hundred sixty-eight billion, four hundred seventy-nine million, nine hundred twenty-eight thousand, four hundred sixty".