17720382055 has 16 divisors (see below), whose sum is σ = 22534961184. Its totient is φ = 13330759680.

The previous prime is 17720382011. The next prime is 17720382073. The reversal of 17720382055 is 55028302771.

It is a happy number.

It is not a de Polignac number, because 17720382055 - 2⁷ = 17720381927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17720381999 and 17720382017.

It is a congruent number.

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, 7600 + ... + 188410.

It is an arithmetic number, because the mean of its divisors is an integer number (1408435074).

Almost surely, 2^17720382055 is an apocalyptic number.

17720382055 is a deficient number, since it is larger than the sum of its proper divisors (4814579129).

17720382055 is a wasteful number, since it uses less digits than its factorization.

17720382055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181986.

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 17720382055 in words is "seventeen billion, seven hundred twenty million, three hundred eighty-two thousand, fifty-five".