17981849088 has 480 divisors, whose sum is σ = 62643609600. Its totient is φ = 4958392320.

The previous prime is 17981849023. The next prime is 17981849089. The reversal of 17981849088 is 88094818971.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17981849089) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48996681 + ... + 48997047.

It is an arithmetic number, because the mean of its divisors is an integer number (130507520).

Almost surely, 2^17981849088 is an apocalyptic number.

17981849088 is a gapful number since it is divisible by the number (18) 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 17981849088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31321804800).

17981849088 is an abundant number, since it is smaller than the sum of its proper divisors (44661760512).

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

17981849088 is an equidigital number, since it uses as much as digits as its factorization.

17981849088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 63.

The spelling of 17981849088 in words is "seventeen billion, nine hundred eighty-one million, eight hundred forty-nine thousand, eighty-eight".