19810764696 has 64 divisors (see below), whose sum is σ = 50200456320. Its totient is φ = 6514027520.

The previous prime is 19810764691. The next prime is 19810764697. The reversal of 19810764696 is 69646701891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19810764691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1353256 + ... + 1367816.

It is an arithmetic number, because the mean of its divisors is an integer number (784382130).

Almost surely, 2^19810764696 is an apocalyptic number.

It is an amenable number.

19810764696 is an abundant number, since it is smaller than the sum of its proper divisors (30389691624).

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

19810764696 is a wasteful number, since it uses less digits than its factorization.

19810764696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15336 (or 15332 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 19810764696 in words is "nineteen billion, eight hundred ten million, seven hundred sixty-four thousand, six hundred ninety-six".