19923084765 has 48 divisors (see below), whose sum is σ = 35267834160. Its totient is φ = 10402022400.

The previous prime is 19923084761. The next prime is 19923084773. The reversal of 19923084765 is 56748032991.

It can be written as a sum of positive squares in 8 ways, for example, as 508006521 + 19415078244 = 22539^2 + 139338^2 .

It is not a de Polignac number, because 19923084765 - 2² = 19923084761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19923084761) 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, 379879 + ... + 429131.

It is an arithmetic number, because the mean of its divisors is an integer number (734746545).

It is a 1-persistent number, because it is pandigital, but 2⋅19923084765 = 39846169530 is not.

Almost surely, 2^19923084765 is an apocalyptic number.

19923084765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19923084765 is a deficient number, since it is larger than the sum of its proper divisors (15344749395).

19923084765 is a wasteful number, since it uses less digits than its factorization.

19923084765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49454 (or 49451 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 19923084765 in words is "nineteen billion, nine hundred twenty-three million, eighty-four thousand, seven hundred sixty-five".