19783913456 has 20 divisors (see below), whose sum is σ = 38480489472. Its totient is φ = 9853464576.

The previous prime is 19783913447. The next prime is 19783913459. The reversal of 19783913456 is 65431938791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19783913459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2401520 + ... + 2409743.

Almost surely, 2^19783913456 is an apocalyptic number.

19783913456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19783913456 is a deficient number, since it is larger than the sum of its proper divisors (18696576016).

19783913456 is a wasteful number, since it uses less digits than its factorization.

19783913456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4811528 (or 4811522 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 56.

The spelling of 19783913456 in words is "nineteen billion, seven hundred eighty-three million, nine hundred thirteen thousand, four hundred fifty-six".