18726890886 has 24 divisors (see below), whose sum is σ = 44263560744. Its totient is φ = 5674815360.

The previous prime is 18726890879. The next prime is 18726890887. The reversal of 18726890886 is 68809862781.

It is a super-4 number, since 4×18726890886⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18726890887) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 47289931 + ... + 47290326.

It is an arithmetic number, because the mean of its divisors is an integer number (1844315031).

Almost surely, 2^18726890886 is an apocalyptic number.

18726890886 is an abundant number, since it is smaller than the sum of its proper divisors (25536669858).

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

18726890886 is a wasteful number, since it uses less digits than its factorization.

18726890886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94580276 (or 94580273 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 63.

The spelling of 18726890886 in words is "eighteen billion, seven hundred twenty-six million, eight hundred ninety thousand, eight hundred eighty-six".