18355055552 has 28 divisors (see below), whose sum is σ = 36428248200. Its totient is φ = 9176284416.

The previous prime is 18355055527. The next prime is 18355055561. The reversal of 18355055552 is 25555055381.

It is a congruent number.

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, 619574 + ... + 648522.

Almost surely, 2^18355055552 is an apocalyptic number.

It is an amenable number.

18355055552 is a deficient number, since it is larger than the sum of its proper divisors (18073192648).

18355055552 is an equidigital number, since it uses as much as digits as its factorization.

18355055552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38868 (or 38858 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 44.

The spelling of 18355055552 in words is "eighteen billion, three hundred fifty-five million, fifty-five thousand, five hundred fifty-two".