18787480724 has 24 divisors (see below), whose sum is σ = 34628223168. Its totient is φ = 8901337280.

The previous prime is 18787480703. The next prime is 18787480741. The reversal of 18787480724 is 42708478781.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18787480724.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944417 + ... + 964104.

It is an arithmetic number, because the mean of its divisors is an integer number (1442842632).

Almost surely, 2^18787480724 is an apocalyptic number.

It is an amenable number.

18787480724 is a deficient number, since it is larger than the sum of its proper divisors (15840742444).

18787480724 is a wasteful number, since it uses less digits than its factorization.

18787480724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908655 (or 1908653 counting only the distinct ones).

The product of its (nonzero) digits is 5619712, while the sum is 56.

The spelling of 18787480724 in words is "eighteen billion, seven hundred eighty-seven million, four hundred eighty thousand, seven hundred twenty-four".