19903755505 has 32 divisors (see below), whose sum is σ = 24818846976. Its totient is φ = 15312374784.

The previous prime is 19903755503. The next prime is 19903755523. The reversal of 19903755505 is 50555730991.

It is a cyclic number.

It is not a de Polignac number, because 19903755505 - 2¹ = 19903755503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19903755503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16683189 + ... + 16684381.

It is an arithmetic number, because the mean of its divisors is an integer number (775588968).

Almost surely, 2^19903755505 is an apocalyptic number.

It is an amenable number.

19903755505 is a deficient number, since it is larger than the sum of its proper divisors (4915091471).

19903755505 is a wasteful number, since it uses less digits than its factorization.

19903755505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377.

The product of its (nonzero) digits is 1063125, while the sum is 49.

The spelling of 19903755505 in words is "nineteen billion, nine hundred three million, seven hundred fifty-five thousand, five hundred five".