18851142628 has 12 divisors (see below), whose sum is σ = 33548644080. Its totient is φ = 9265815752.

The previous prime is 18851142613. The next prime is 18851142641. The reversal of 18851142628 is 82624115881.

It is a happy 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 3 ways as a sum of consecutive naturals, for example, 39938626 + ... + 39939097.

It is an arithmetic number, because the mean of its divisors is an integer number (2795720340).

Almost surely, 2^18851142628 is an apocalyptic number.

It is an amenable number.

18851142628 is a deficient number, since it is larger than the sum of its proper divisors (14697501452).

18851142628 is a wasteful number, since it uses less digits than its factorization.

18851142628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79877786 (or 79877784 counting only the distinct ones).

The product of its digits is 245760, while the sum is 46.

The spelling of 18851142628 in words is "eighteen billion, eight hundred fifty-one million, one hundred forty-two thousand, six hundred twenty-eight".