19805960718 has 48 divisors (see below), whose sum is σ = 43583042256. Its totient is φ = 6499025280.

The previous prime is 19805960711. The next prime is 19805960737. The reversal of 19805960718 is 81706950891.

19805960718 is a `hidden beast` number, since 19 + 8 + 0 + 5 + 9 + 607 + 18 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19805960711) 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 23 ways as a sum of consecutive naturals, for example, 2094930 + ... + 2104362.

It is an arithmetic number, because the mean of its divisors is an integer number (907980047).

Almost surely, 2^19805960718 is an apocalyptic number.

19805960718 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19805960718 is an abundant number, since it is smaller than the sum of its proper divisors (23777081538).

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

19805960718 is a wasteful number, since it uses less digits than its factorization.

19805960718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11249 (or 11246 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 54.

The spelling of 19805960718 in words is "nineteen billion, eight hundred five million, nine hundred sixty thousand, seven hundred eighteen".