18551551748 has 24 divisors (see below), whose sum is σ = 33226892160. Its totient is φ = 9058240800.

The previous prime is 18551551727. The next prime is 18551551757. The reversal of 18551551748 is 84715515581.

It is a junction number, because it is equal to n+sod(n) for n = 18551551696 and 18551551705.

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 7 ways as a sum of consecutive naturals, for example, 1327598 + ... + 1341498.

It is an arithmetic number, because the mean of its divisors is an integer number (1384453840).

Almost surely, 2^18551551748 is an apocalyptic number.

It is an amenable number.

18551551748 is a deficient number, since it is larger than the sum of its proper divisors (14675340412).

18551551748 is a wasteful number, since it uses less digits than its factorization.

18551551748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21707 (or 21705 counting only the distinct ones).

The product of its digits is 1120000, while the sum is 50.

The spelling of 18551551748 in words is "eighteen billion, five hundred fifty-one million, five hundred fifty-one thousand, seven hundred forty-eight".