18729678146 has 32 divisors (see below), whose sum is σ = 30573158400. Its totient is φ = 8572821840.

The previous prime is 18729678137. The next prime is 18729678151. The reversal of 18729678146 is 64187692781.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792935 + ... + 816213.

It is an arithmetic number, because the mean of its divisors is an integer number (955411200).

Almost surely, 2^18729678146 is an apocalyptic number.

18729678146 is a deficient number, since it is larger than the sum of its proper divisors (11843480254).

18729678146 is a wasteful number, since it uses less digits than its factorization.

18729678146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24014.

The product of its digits is 8128512, while the sum is 59.

The spelling of 18729678146 in words is "eighteen billion, seven hundred twenty-nine million, six hundred seventy-eight thousand, one hundred forty-six".