17977990018 has 8 divisors (see below), whose sum is σ = 26977142412. Its totient is φ = 8985609216.

The previous prime is 17977989959. The next prime is 17977990033. The reversal of 17977990018 is 81009977971.

It can be written as a sum of positive squares in 2 ways, for example, as 17385213609 + 592776409 = 131853^2 + 24347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1686255 + ... + 1696882.

Almost surely, 2^17977990018 is an apocalyptic number.

17977990018 is a deficient number, since it is larger than the sum of its proper divisors (8999152394).

17977990018 is a wasteful number, since it uses less digits than its factorization.

17977990018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385796.

The product of its (nonzero) digits is 2000376, while the sum is 58.

The spelling of 17977990018 in words is "seventeen billion, nine hundred seventy-seven million, nine hundred ninety thousand, eighteen".