18668355000550 has 48 divisors (see below), whose sum is σ = 35769343709232. Its totient is φ = 7243571491200.

The previous prime is 18668355000539. The next prime is 18668355000569. The reversal of 18668355000550 is 5500055386681.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14630857 + ... + 15855556.

It is an arithmetic number, because the mean of its divisors is an integer number (745194660609).

Almost surely, 2^{18668355000550} is an apocalyptic number.

18668355000550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18668355000550 is a deficient number, since it is larger than the sum of its proper divisors (17100988708682).

18668355000550 is a wasteful number, since it uses less digits than its factorization.

18668355000550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30486793 (or 30486788 counting only the distinct ones).

The product of its (nonzero) digits is 4320000, while the sum is 52.

The spelling of 18668355000550 in words is "eighteen trillion, six hundred sixty-eight billion, three hundred fifty-five million, five hundred fifty", and thus it is an aban number.