17947609842 has 32 divisors (see below), whose sum is σ = 37161996480. Its totient is φ = 5771729600.

The previous prime is 17947609789. The next prime is 17947609847. The reversal of 17947609842 is 24890674971.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (17947609847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186733 + ... + 266015.

It is an arithmetic number, because the mean of its divisors is an integer number (1161312390).

Almost surely, 2^17947609842 is an apocalyptic number.

17947609842 is an abundant number, since it is smaller than the sum of its proper divisors (19214386638).

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

17947609842 is a wasteful number, since it uses less digits than its factorization.

17947609842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80618.

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 17947609842 in words is "seventeen billion, nine hundred forty-seven million, six hundred nine thousand, eight hundred forty-two".