18540396814212 has 216 divisors, whose sum is σ = 58758809095896. Its totient is φ = 4885814578176.

The previous prime is 18540396814183. The next prime is 18540396814231. The reversal of 18540396814212 is 21241869304581.

18540396814212 is a `hidden beast` number, since 1 + 8 + 5 + 403 + 9 + 6 + 8 + 14 + 212 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7523467495236 + 11016929318976 = 2742894^2 + 3319176^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 28040088 + ... + 28693680.

Almost surely, 2^{18540396814212} is an apocalyptic number.

18540396814212 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 18540396814212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29379404547948).

18540396814212 is an abundant number, since it is smaller than the sum of its proper divisors (40218412281684).

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

18540396814212 is a wasteful number, since it uses less digits than its factorization.

18540396814212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654867 (or 654855 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 18540396814212 in words is "eighteen trillion, five hundred forty billion, three hundred ninety-six million, eight hundred fourteen thousand, two hundred twelve".