18286049128 has 32 divisors (see below), whose sum is σ = 35230753800. Its totient is φ = 8891430912.

The previous prime is 18286049123. The next prime is 18286049137. The reversal of 18286049128 is 82194068281.

It can be written as a sum of positive squares in 4 ways, for example, as 14606656164 + 3679392964 = 120858^2 + 60658^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (18286049123) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 615676 + ... + 644692.

Almost surely, 2^18286049128 is an apocalyptic number.

It is an amenable number.

18286049128 is a deficient number, since it is larger than the sum of its proper divisors (16944704672).

18286049128 is a wasteful number, since it uses less digits than its factorization.

18286049128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31189 (or 31185 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 49.

The spelling of 18286049128 in words is "eighteen billion, two hundred eighty-six million, forty-nine thousand, one hundred twenty-eight".