19780430679 has 24 divisors (see below), whose sum is σ = 29515454592. Its totient is φ = 12752026560.

The previous prime is 19780430671. The next prime is 19780430701. The reversal of 19780430679 is 97603408791.

It is a happy number.

19780430679 is a `hidden beast` number, since 197 + 80 + 4 + 306 + 79 = 666.

It is not a de Polignac number, because 19780430679 - 2³ = 19780430671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19780430671) 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 23 ways as a sum of consecutive naturals, for example, 357249 + ... + 408885.

It is an arithmetic number, because the mean of its divisors is an integer number (1229810608).

Almost surely, 2^19780430679 is an apocalyptic number.

19780430679 is a deficient number, since it is larger than the sum of its proper divisors (9735023913).

19780430679 is a wasteful number, since it uses less digits than its factorization.

19780430679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53047 (or 53044 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 19780430679 in words is "nineteen billion, seven hundred eighty million, four hundred thirty thousand, six hundred seventy-nine".