19900355304085 has 16 divisors (see below), whose sum is σ = 23985884300400. Its totient is φ = 15849985775616.

The previous prime is 19900355304059. The next prime is 19900355304101. The reversal of 19900355304085 is 58040355300991.

It can be written as a sum of positive squares in 8 ways, for example, as 643643571076 + 19256711733009 = 802274^2 + 4388247^2 .

It is a cyclic number.

It is not a de Polignac number, because 19900355304085 - 2⁷ = 19900355303957 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 23511211 + ... + 24342919.

It is an arithmetic number, because the mean of its divisors is an integer number (1499117768775).

Almost surely, 2^{19900355304085} is an apocalyptic number.

It is an amenable number.

19900355304085 is a deficient number, since it is larger than the sum of its proper divisors (4085528996315).

19900355304085 is a wasteful number, since it uses less digits than its factorization.

19900355304085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852840.

The product of its (nonzero) digits is 2916000, while the sum is 52.

The spelling of 19900355304085 in words is "nineteen trillion, nine hundred billion, three hundred fifty-five million, three hundred four thousand, eighty-five".