18108942835944 has 128 divisors (see below), whose sum is σ = 47047421030400. Its totient is φ = 5804237514240.

The previous prime is 18108942835943. The next prime is 18108942835961. The reversal of 18108942835944 is 44953824980181.

It is a super-2 number, since 2×18108942835944² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18108942835943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33955977 + ... + 34485159.

It is an arithmetic number, because the mean of its divisors is an integer number (367557976800).

Almost surely, 2^{18108942835944} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18108942835944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23523710515200).

18108942835944 is an abundant number, since it is smaller than the sum of its proper divisors (28938478194456).

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

18108942835944 is a wasteful number, since it uses less digits than its factorization.

18108942835944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529735 (or 529731 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 66.

The spelling of 18108942835944 in words is "eighteen trillion, one hundred eight billion, nine hundred forty-two million, eight hundred thirty-five thousand, nine hundred forty-four".