18912908982550 has 48 divisors (see below), whose sum is σ = 38376445839552. Its totient is φ = 6877343642400.

The previous prime is 18912908982521. The next prime is 18912908982551. The reversal of 18912908982550 is 5528980921981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18912908982551) 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 23 ways as a sum of consecutive naturals, for example, 74556229 + ... + 74809471.

It is an arithmetic number, because the mean of its divisors is an integer number (799509288324).

Almost surely, 2^{18912908982550} is an apocalyptic number.

18912908982550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18912908982550 is an abundant number, since it is smaller than the sum of its proper divisors (19463536857002).

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

18912908982550 is a wasteful number, since it uses less digits than its factorization.

18912908982550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389053 (or 389048 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 67.

The spelling of 18912908982550 in words is "eighteen trillion, nine hundred twelve billion, nine hundred eight million, nine hundred eighty-two thousand, five hundred fifty".