19930425849 has 24 divisors (see below), whose sum is σ = 29302520832. Its totient is φ = 13051735200.

The previous prime is 19930425799. The next prime is 19930425869. The reversal of 19930425849 is 94852403991.

19930425849 is a `hidden beast` number, since 19 + 9 + 3 + 0 + 42 + 584 + 9 = 666.

It is not a de Polignac number, because 19930425849 - 2⁷ = 19930425721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19930425795 and 19930425804.

It is not an unprimeable number, because it can be changed into a prime (19930425869) 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 23 ways as a sum of consecutive naturals, for example, 29122 + ... + 201764.

It is an arithmetic number, because the mean of its divisors is an integer number (1220938368).

Almost surely, 2^19930425849 is an apocalyptic number.

It is an amenable number.

19930425849 is a deficient number, since it is larger than the sum of its proper divisors (9372094983).

19930425849 is a wasteful number, since it uses less digits than its factorization.

19930425849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172877 (or 172874 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 19930425849 in words is "nineteen billion, nine hundred thirty million, four hundred twenty-five thousand, eight hundred forty-nine".