13943845818 has 384 divisors, whose sum is σ = 40974336000. Its totient is φ = 3484736640.

The previous prime is 13943845813. The next prime is 13943845829. The reversal of 13943845818 is 81854834931.

13943845818 is a `hidden beast` number, since 13 + 9 + 43 + 8 + 4 + 581 + 8 = 666.

It is a super-3 number, since 3×13943845818³ (a number of 31 digits) contains 333 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (13943845813) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 35845168 + ... + 35845556.

It is an arithmetic number, because the mean of its divisors is an integer number (106704000).

Almost surely, 2^13943845818 is an apocalyptic number.

13943845818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13943845818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20487168000).

13943845818 is an abundant number, since it is smaller than the sum of its proper divisors (27030490182).

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

13943845818 is a wasteful number, since it uses less digits than its factorization.

13943845818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487 (or 474 counting only the distinct ones).

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

The spelling of 13943845818 in words is "thirteen billion, nine hundred forty-three million, eight hundred forty-five thousand, eight hundred eighteen".