18761789268 has 90 divisors (see below), whose sum is σ = 49300781838. Its totient is φ = 6221733120.

The previous prime is 18761789231. The next prime is 18761789281. The reversal of 18761789268 is 86298716781.

18761789268 is a `hidden beast` number, since 1 + 8 + 7 + 617 + 8 + 9 + 2 + 6 + 8 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 10745810244 + 8015979024 = 103662^2 + 89532^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 18817746 + ... + 18818742.

Almost surely, 2^18761789268 is an apocalyptic number.

18761789268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18761789268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24650390919).

18761789268 is an abundant number, since it is smaller than the sum of its proper divisors (30538992570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18761789268 is an equidigital number, since it uses as much as digits as its factorization.

18761789268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495 (or 1243 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 63.

The spelling of 18761789268 in words is "eighteen billion, seven hundred sixty-one million, seven hundred eighty-nine thousand, two hundred sixty-eight".