19985570383855 has 8 divisors (see below), whose sum is σ = 24630865121952. Its totient is φ = 15556335866208.

The previous prime is 19985570383853. The next prime is 19985570383859. The reversal of 19985570383855 is 55838307558991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19985570383855 - 2¹ = 19985570383853 is a prime.

It is a super-2 number, since 2×19985570383855² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19985570383853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54015054907 + ... + 54015055276.

It is an arithmetic number, because the mean of its divisors is an integer number (3078858140244).

Almost surely, 2^{19985570383855} is an apocalyptic number.

19985570383855 is a deficient number, since it is larger than the sum of its proper divisors (4645294738097).

19985570383855 is a wasteful number, since it uses less digits than its factorization.

19985570383855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108030110225.

The product of its (nonzero) digits is 1632960000, while the sum is 76.

The spelling of 19985570383855 in words is "nineteen trillion, nine hundred eighty-five billion, five hundred seventy million, three hundred eighty-three thousand, eight hundred fifty-five".