18849861748 has 24 divisors (see below), whose sum is σ = 33073739720. Its totient is φ = 9400250880.

The previous prime is 18849861743. The next prime is 18849861763. The reversal of 18849861748 is 84716894881.

It can be written as a sum of positive squares in 4 ways, for example, as 302690404 + 18547171344 = 17398^2 + 136188^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18849861748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18849861743) by changing a digit.

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, 3791008 + ... + 3795976.

Almost surely, 2^18849861748 is an apocalyptic number.

It is an amenable number.

18849861748 is a deficient number, since it is larger than the sum of its proper divisors (14223877972).

18849861748 is a wasteful number, since it uses less digits than its factorization.

18849861748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7267 (or 7265 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 64.

The spelling of 18849861748 in words is "eighteen billion, eight hundred forty-nine million, eight hundred sixty-one thousand, seven hundred forty-eight".