19885121063 has 8 divisors (see below), whose sum is σ = 20756789088. Its totient is φ = 19014044544.

The previous prime is 19885121059. The next prime is 19885121077. The reversal of 19885121063 is 36012158891.

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 19885121063 - 2² = 19885121059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19885121083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78470 + ... + 214307.

It is an arithmetic number, because the mean of its divisors is an integer number (2594598636).

Almost surely, 2^19885121063 is an apocalyptic number.

19885121063 is a deficient number, since it is larger than the sum of its proper divisors (871668025).

19885121063 is a wasteful number, since it uses less digits than its factorization.

19885121063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295753.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 19885121063 in words is "nineteen billion, eight hundred eighty-five million, one hundred twenty-one thousand, sixty-three".