18781666152 has 16 divisors (see below), whose sum is σ = 46954165440. Its totient is φ = 6260555376.

The previous prime is 18781666073. The next prime is 18781666177. The reversal of 18781666152 is 25166618781.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 18781666095 and 18781666104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391284688 + ... + 391284735.

It is an arithmetic number, because the mean of its divisors is an integer number (2934635340).

Almost surely, 2^18781666152 is an apocalyptic number.

18781666152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18781666152 is an abundant number, since it is smaller than the sum of its proper divisors (28172499288).

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

18781666152 is a wasteful number, since it uses less digits than its factorization.

18781666152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782569432 (or 782569428 counting only the distinct ones).

The product of its digits is 967680, while the sum is 51.

The spelling of 18781666152 in words is "eighteen billion, seven hundred eighty-one million, six hundred sixty-six thousand, one hundred fifty-two".