17987649514 has 32 divisors (see below), whose sum is σ = 28686827520. Its totient is φ = 8441505072.

The previous prime is 17987649497. The next prime is 17987649521. The reversal of 17987649514 is 41594678971.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577159 + ... + 607525.

It is an arithmetic number, because the mean of its divisors is an integer number (896463360).

Almost surely, 2^17987649514 is an apocalyptic number.

17987649514 is a deficient number, since it is larger than the sum of its proper divisors (10699178006).

17987649514 is a wasteful number, since it uses less digits than its factorization.

17987649514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30634.

The product of its digits is 15240960, while the sum is 61.

The spelling of 17987649514 in words is "seventeen billion, nine hundred eighty-seven million, six hundred forty-nine thousand, five hundred fourteen".