17989409742 has 16 divisors (see below), whose sum is σ = 35980741200. Its totient is φ = 5996149632.

The previous prime is 17989409723. The next prime is 17989409747. The reversal of 17989409742 is 24790498971.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17989409747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60648 + ... + 199140.

It is an arithmetic number, because the mean of its divisors is an integer number (2248796325).

Almost surely, 2^17989409742 is an apocalyptic number.

17989409742 is an abundant number, since it is smaller than the sum of its proper divisors (17991331458).

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

17989409742 is a wasteful number, since it uses less digits than its factorization.

17989409742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160147.

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 17989409742 in words is "seventeen billion, nine hundred eighty-nine million, four hundred nine thousand, seven hundred forty-two".