17994205755 has 16 divisors (see below), whose sum is σ = 31989699360. Its totient is φ = 9596909664.

The previous prime is 17994205739. The next prime is 17994205769. The reversal of 17994205755 is 55750249971.

It is a happy number.

It is not a de Polignac number, because 17994205755 - 2⁴ = 17994205739 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66645072 + ... + 66645341.

It is an arithmetic number, because the mean of its divisors is an integer number (1999356210).

Almost surely, 2^17994205755 is an apocalyptic number.

17994205755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

17994205755 is a deficient number, since it is larger than the sum of its proper divisors (13995493605).

17994205755 is a wasteful number, since it uses less digits than its factorization.

17994205755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133290427 (or 133290421 counting only the distinct ones).

The product of its (nonzero) digits is 3969000, while the sum is 54.

The spelling of 17994205755 in words is "seventeen billion, nine hundred ninety-four million, two hundred five thousand, seven hundred fifty-five".