19617047979993 has 12 divisors (see below), whose sum is σ = 28416007182420. Its totient is φ = 13040983735296.

The previous prime is 19617047979989. The next prime is 19617047980003. The reversal of 19617047979993 is 39997974071691.

19617047979993 is a `hidden beast` number, since 1 + 9 + 6 + 1 + 70 + 479 + 79 + 9 + 9 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6673113398169 + 12943934581824 = 2583237^2 + 3597768^2 .

It is not a de Polignac number, because 19617047979993 - 2² = 19617047979989 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19617047979953) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3087350928 + ... + 3087357281.

It is an arithmetic number, because the mean of its divisors is an integer number (2368000598535).

Almost surely, 2^{19617047979993} is an apocalyptic number.

It is an amenable number.

19617047979993 is a deficient number, since it is larger than the sum of its proper divisors (8798959202427).

19617047979993 is a wasteful number, since it uses less digits than its factorization.

19617047979993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6174708568 (or 6174708565 counting only the distinct ones).

The product of its (nonzero) digits is 1458274104, while the sum is 81.

The spelling of 19617047979993 in words is "nineteen trillion, six hundred seventeen billion, forty-seven million, nine hundred seventy-nine thousand, nine hundred ninety-three".