19913065860 has 48 divisors (see below), whose sum is σ = 55769749056. Its totient is φ = 5308897152.

The previous prime is 19913065849. The next prime is 19913065897. The reversal of 19913065860 is 6856031991.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232647 + ... + 306513.

It is an arithmetic number, because the mean of its divisors is an integer number (1161869772).

Almost surely, 2^19913065860 is an apocalyptic number.

19913065860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19913065860 is an abundant number, since it is smaller than the sum of its proper divisors (35856683196).

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

19913065860 is a wasteful number, since it uses less digits than its factorization.

19913065860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78372 (or 78370 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 19913065860 in words is "nineteen billion, nine hundred thirteen million, sixty-five thousand, eight hundred sixty".