27984947518 has 48 divisors (see below), whose sum is σ = 46811701440. Its totient is φ = 12535997760.

The previous prime is 27984947483. The next prime is 27984947593. The reversal of 27984947518 is 81574948972.

It is a self number, because there is not a number n which added to its sum of digits gives 27984947518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14012496 + ... + 14014492.

It is an arithmetic number, because the mean of its divisors is an integer number (975243780).

Almost surely, 2^27984947518 is an apocalyptic number.

27984947518 is a deficient number, since it is larger than the sum of its proper divisors (18826753922).

27984947518 is a wasteful number, since it uses less digits than its factorization.

27984947518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2833 (or 2822 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 64.

The spelling of 27984947518 in words is "twenty-seven billion, nine hundred eighty-four million, nine hundred forty-seven thousand, five hundred eighteen".