17988781122 has 96 divisors (see below), whose sum is σ = 43386610176. Its totient is φ = 5349196800.

The previous prime is 17988781099. The next prime is 17988781123. The reversal of 17988781122 is 22118788971.

It is a super-3 number, since 3×17988781122³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (17988781123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7912978 + ... + 7915250.

It is an arithmetic number, because the mean of its divisors is an integer number (451943856).

Almost surely, 2^17988781122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 17988781122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21693305088).

17988781122 is an abundant number, since it is smaller than the sum of its proper divisors (25397829054).

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

17988781122 is a wasteful number, since it uses less digits than its factorization.

17988781122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3416 (or 3413 counting only the distinct ones).

The product of its digits is 903168, while the sum is 54.

The spelling of 17988781122 in words is "seventeen billion, nine hundred eighty-eight million, seven hundred eighty-one thousand, one hundred twenty-two".