18849886628 has 12 divisors (see below), whose sum is σ = 33279225420. Its totient is φ = 9341536512.

The previous prime is 18849886621. The next prime is 18849886669. The reversal of 18849886628 is 82668894881.

It can be written as a sum of positive squares in 2 ways, for example, as 795127204 + 18054759424 = 28198^2 + 134368^2 .

It is not an unprimeable number, because it can be changed into a prime (18849886621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20851193 + ... + 20852096.

It is an arithmetic number, because the mean of its divisors is an integer number (2773268785).

Almost surely, 2^18849886628 is an apocalyptic number.

It is an amenable number.

18849886628 is a deficient number, since it is larger than the sum of its proper divisors (14429338792).

18849886628 is a wasteful number, since it uses less digits than its factorization.

18849886628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41703406 (or 41703404 counting only the distinct ones).

The product of its digits is 84934656, while the sum is 68.

The spelling of 18849886628 in words is "eighteen billion, eight hundred forty-nine million, eight hundred eighty-six thousand, six hundred twenty-eight".