19885389901 has 24 divisors (see below), whose sum is σ = 21751994880. Its totient is φ = 18169632000.

The previous prime is 19885389863. The next prime is 19885389917. The reversal of 19885389901 is 10998358891.

It is not a de Polignac number, because 19885389901 - 2¹¹ = 19885387853 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19885389901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19885389401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9418836 + ... + 9420946.

It is an arithmetic number, because the mean of its divisors is an integer number (906333120).

Almost surely, 2^19885389901 is an apocalyptic number.

It is an amenable number.

19885389901 is a deficient number, since it is larger than the sum of its proper divisors (1866604979).

19885389901 is a wasteful number, since it uses less digits than its factorization.

19885389901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2677 (or 2664 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 61.

The spelling of 19885389901 in words is "nineteen billion, eight hundred eighty-five million, three hundred eighty-nine thousand, nine hundred one".