18514838412 has 240 divisors, whose sum is σ = 57920163840. Its totient is φ = 5045846400.

The previous prime is 18514838389. The next prime is 18514838429. The reversal of 18514838412 is 21483841581.

18514838412 is a `hidden beast` number, since 1 + 85 + 1 + 483 + 84 + 12 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4990014 + ... + 4993722.

It is an arithmetic number, because the mean of its divisors is an integer number (241334016).

Almost surely, 2^18514838412 is an apocalyptic number.

18514838412 is a gapful number since it is divisible by the number (12) 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 18514838412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28960081920).

18514838412 is an abundant number, since it is smaller than the sum of its proper divisors (39405325428).

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

18514838412 is a wasteful number, since it uses less digits than its factorization.

18514838412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834 (or 3823 counting only the distinct ones).

The product of its digits is 245760, while the sum is 45.

The spelling of 18514838412 in words is "eighteen billion, five hundred fourteen million, eight hundred thirty-eight thousand, four hundred twelve".