17974478985 has 16 divisors (see below), whose sum is σ = 28903689600. Its totient is φ = 9538214400.

The previous prime is 17974478983. The next prime is 17974479013. The reversal of 17974478985 is 58987447971.

It is not a de Polignac number, because 17974478985 - 2¹ = 17974478983 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (17974478983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3007816 + ... + 3013785.

It is an arithmetic number, because the mean of its divisors is an integer number (1806480600).

Almost surely, 2^17974478985 is an apocalyptic number.

17974478985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17974478985 is a deficient number, since it is larger than the sum of its proper divisors (10929210615).

17974478985 is a wasteful number, since it uses less digits than its factorization.

17974478985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6021808.

The product of its digits is 142248960, while the sum is 69.

The spelling of 17974478985 in words is "seventeen billion, nine hundred seventy-four million, four hundred seventy-eight thousand, nine hundred eighty-five".