18966549880 has 16 divisors (see below), whose sum is σ = 42674737320. Its totient is φ = 7586619936.

The previous prime is 18966549871. The next prime is 18966549881. The reversal of 18966549880 is 8894566981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18966549881) 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 3 ways as a sum of consecutive naturals, for example, 237081834 + ... + 237081913.

Almost surely, 2^18966549880 is an apocalyptic number.

18966549880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18966549880 is an abundant number, since it is smaller than the sum of its proper divisors (23708187440).

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

18966549880 is a wasteful number, since it uses less digits than its factorization.

18966549880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474163758 (or 474163754 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 64.

The spelling of 18966549880 in words is "eighteen billion, nine hundred sixty-six million, five hundred forty-nine thousand, eight hundred eighty".