19976256320 has 42 divisors (see below), whose sum is σ = 47574481686. Its totient is φ = 7989491200.

The previous prime is 19976256299. The next prime is 19976256323. The reversal of 19976256320 is 2365267991.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4819691776 + 15156564544 = 69424^2 + 123112^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19976256323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2524370 + ... + 2532270.

Almost surely, 2^19976256320 is an apocalyptic number.

19976256320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19976256320 is an abundant number, since it is smaller than the sum of its proper divisors (27598225366).

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

19976256320 is an frugal number, since it uses more digits than its factorization.

19976256320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15819 (or 7908 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 50.

The spelling of 19976256320 in words is "nineteen billion, nine hundred seventy-six million, two hundred fifty-six thousand, three hundred twenty".