19375685640 has 96 divisors (see below), whose sum is σ = 63173822400. Its totient is φ = 5150206080.

The previous prime is 19375685633. The next prime is 19375685653. The reversal of 19375685640 is 4658657391.

19375685640 is a `hidden beast` number, since 1 + 9 + 3 + 75 + 6 + 8 + 564 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25431 + ... + 198489.

It is an arithmetic number, because the mean of its divisors is an integer number (658060650).

Almost surely, 2^19375685640 is an apocalyptic number.

19375685640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19375685640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31586911200).

19375685640 is an abundant number, since it is smaller than the sum of its proper divisors (43798136760).

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

19375685640 is a wasteful number, since it uses less digits than its factorization.

19375685640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173387 (or 173380 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 54.

The spelling of 19375685640 in words is "nineteen billion, three hundred seventy-five million, six hundred eighty-five thousand, six hundred forty".