18427921848 has 160 divisors (see below), whose sum is σ = 59183055360. Its totient is φ = 5247789120.

The previous prime is 18427921781. The next prime is 18427921859. The reversal of 18427921848 is 84812972481.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 18427921794 and 18427921803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1404165 + ... + 1417227.

It is an arithmetic number, because the mean of its divisors is an integer number (369894096).

Almost surely, 2^18427921848 is an apocalyptic number.

18427921848 is a gapful number since it is divisible by the number (18) 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 18427921848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29591527680).

18427921848 is an abundant number, since it is smaller than the sum of its proper divisors (40755133512).

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

18427921848 is a wasteful number, since it uses less digits than its factorization.

18427921848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13399 (or 13386 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The spelling of 18427921848 in words is "eighteen billion, four hundred twenty-seven million, nine hundred twenty-one thousand, eight hundred forty-eight".