17989739940 has 48 divisors (see below), whose sum is σ = 52108217280. Its totient is φ = 4631840640.

The previous prime is 17989739903. The next prime is 17989739947. The reversal of 17989739940 is 4993798971.

It is not an unprimeable number, because it can be changed into a prime (17989739947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5167726 + ... + 5171205.

It is an arithmetic number, because the mean of its divisors is an integer number (1085587860).

Almost surely, 2^17989739940 is an apocalyptic number.

17989739940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

17989739940 is an abundant number, since it is smaller than the sum of its proper divisors (34118477340).

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

17989739940 is a wasteful number, since it uses less digits than its factorization.

17989739940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10338972 (or 10338970 counting only the distinct ones).

The product of its (nonzero) digits is 30862944, while the sum is 66.

The spelling of 17989739940 in words is "seventeen billion, nine hundred eighty-nine million, seven hundred thirty-nine thousand, nine hundred forty".