19885941505 has 32 divisors (see below), whose sum is σ = 25582417920. Its totient is φ = 14786365440.

The previous prime is 19885941469. The next prime is 19885941529. The reversal of 19885941505 is 50514958891.

It is a happy number.

It is not a de Polignac number, because 19885941505 - 2⁷ = 19885941377 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11127222 + ... + 11129008.

It is an arithmetic number, because the mean of its divisors is an integer number (799450560).

Almost surely, 2^19885941505 is an apocalyptic number.

It is an amenable number.

19885941505 is a deficient number, since it is larger than the sum of its proper divisors (5696476415).

19885941505 is a wasteful number, since it uses less digits than its factorization.

19885941505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369.

The product of its (nonzero) digits is 2592000, while the sum is 55.

The spelling of 19885941505 in words is "nineteen billion, eight hundred eighty-five million, nine hundred forty-one thousand, five hundred five".