19385581660 has 48 divisors (see below), whose sum is σ = 41203536192. Its totient is φ = 7660620800.

The previous prime is 19385581591. The next prime is 19385581669. The reversal of 19385581660 is 6618558391.

It is a junction number, because it is equal to n+sod(n) for n = 19385581598 and 19385581607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19385581669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 689070 + ... + 716650.

It is an arithmetic number, because the mean of its divisors is an integer number (858407004).

Almost surely, 2^19385581660 is an apocalyptic number.

19385581660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19385581660 is an abundant number, since it is smaller than the sum of its proper divisors (21817954532).

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

19385581660 is a wasteful number, since it uses less digits than its factorization.

19385581660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28014 (or 28012 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 19385581660 in words is "nineteen billion, three hundred eighty-five million, five hundred eighty-one thousand, six hundred sixty".