18747287146 has 32 divisors (see below), whose sum is σ = 33687739008. Its totient is φ = 7656284160.

The previous prime is 18747287113. The next prime is 18747287227. The reversal of 18747287146 is 64178274781.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355095 + ... + 404458.

It is an arithmetic number, because the mean of its divisors is an integer number (1052741844).

Almost surely, 2^18747287146 is an apocalyptic number.

18747287146 is a deficient number, since it is larger than the sum of its proper divisors (14940451862).

18747287146 is a wasteful number, since it uses less digits than its factorization.

18747287146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759646.

The product of its digits is 4214784, while the sum is 55.

The spelling of 18747287146 in words is "eighteen billion, seven hundred forty-seven million, two hundred eighty-seven thousand, one hundred forty-six".