19928861118 has 24 divisors (see below), whose sum is σ = 43181794656. Its totient is φ = 6642554400.

The previous prime is 19928861111. The next prime is 19928861123. The reversal of 19928861118 is 81116882991.

19928861118 is a `hidden beast` number, since 1 + 9 + 9 + 2 + 8 + 8 + 611 + 18 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19928861111) 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 11 ways as a sum of consecutive naturals, for example, 575578 + ... + 609218.

It is an arithmetic number, because the mean of its divisors is an integer number (1799241444).

Almost surely, 2^19928861118 is an apocalyptic number.

19928861118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19928861118 is an abundant number, since it is smaller than the sum of its proper divisors (23252933538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19928861118 is a wasteful number, since it uses less digits than its factorization.

19928861118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66560 (or 66557 counting only the distinct ones).

The product of its digits is 497664, while the sum is 54.

The spelling of 19928861118 in words is "nineteen billion, nine hundred twenty-eight million, eight hundred sixty-one thousand, one hundred eighteen".