19776323712 has 64 divisors (see below), whose sum is σ = 53250536160. Its totient is φ = 6501795840.

The previous prime is 19776323701. The next prime is 19776323731. The reversal of 19776323712 is 21732367791.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×19776323712² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324714 + ... + 380777.

Almost surely, 2^19776323712 is an apocalyptic number.

19776323712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19776323712 is an abundant number, since it is smaller than the sum of its proper divisors (33474212448).

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

19776323712 is an equidigital number, since it uses as much as digits as its factorization.

19776323712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705581 (or 705569 counting only the distinct ones).

The product of its digits is 666792, while the sum is 48.

The spelling of 19776323712 in words is "nineteen billion, seven hundred seventy-six million, three hundred twenty-three thousand, seven hundred twelve".