19760056540 has 144 divisors (see below), whose sum is σ = 50236653600. Its totient is φ = 6501831168.

The previous prime is 19760056529. The next prime is 19760056543. The reversal of 19760056540 is 4565006791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19760056543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4914651 + ... + 4918669.

It is an arithmetic number, because the mean of its divisors is an integer number (348865650).

Almost surely, 2^19760056540 is an apocalyptic number.

19760056540 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 19760056540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25118326800).

19760056540 is an abundant number, since it is smaller than the sum of its proper divisors (30476597060).

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

19760056540 is a wasteful number, since it uses less digits than its factorization.

19760056540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4244 (or 4235 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 19760056540 in words is "nineteen billion, seven hundred sixty million, fifty-six thousand, five hundred forty".