18772539438312 has 640 divisors, whose sum is σ = 58715297625600. Its totient is φ = 5556309696000.

The previous prime is 18772539438307. The next prime is 18772539438337. The reversal of 18772539438312 is 21383493527781.

18772539438312 is a `hidden beast` number, since 1 + 8 + 7 + 7 + 2 + 539 + 4 + 3 + 83 + 12 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 18772539438312.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 29195239863 + ... + 29195240505.

It is an arithmetic number, because the mean of its divisors is an integer number (91742652540).

Almost surely, 2^{18772539438312} is an apocalyptic number.

18772539438312 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 18772539438312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29357648812800).

18772539438312 is an abundant number, since it is smaller than the sum of its proper divisors (39942758187288).

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

18772539438312 is a wasteful number, since it uses less digits than its factorization.

18772539438312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259 (or 1246 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 18772539438312 in words is "eighteen trillion, seven hundred seventy-two billion, five hundred thirty-nine million, four hundred thirty-eight thousand, three hundred twelve".