17978485242 has 16 divisors (see below), whose sum is σ = 36463407552. Its totient is φ = 5908422240.

The previous prime is 17978485241. The next prime is 17978485249. The reversal of 17978485242 is 24258487971.

It is a super-3 number, since 3×17978485242³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (17978485241) 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, 21101083 + ... + 21101934.

It is an arithmetic number, because the mean of its divisors is an integer number (2278962972).

Almost surely, 2^17978485242 is an apocalyptic number.

17978485242 is an abundant number, since it is smaller than the sum of its proper divisors (18484922310).

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

17978485242 is a wasteful number, since it uses less digits than its factorization.

17978485242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42203093.

The product of its digits is 9031680, while the sum is 57.

The spelling of 17978485242 in words is "seventeen billion, nine hundred seventy-eight million, four hundred eighty-five thousand, two hundred forty-two".