19776928382 has 4 divisors (see below), whose sum is σ = 29665392576. Its totient is φ = 9888464190.

The previous prime is 19776928343. The next prime is 19776928397. The reversal of 19776928382 is 28382967791.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×19776928382² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4944232094 + ... + 4944232097.

It is an arithmetic number, because the mean of its divisors is an integer number (7416348144).

Almost surely, 2^19776928382 is an apocalyptic number.

19776928382 is a deficient number, since it is larger than the sum of its proper divisors (9888464194).

19776928382 is an equidigital number, since it uses as much as digits as its factorization.

19776928382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9888464193.

The product of its digits is 18289152, while the sum is 62.

The spelling of 19776928382 in words is "nineteen billion, seven hundred seventy-six million, nine hundred twenty-eight thousand, three hundred eighty-two".