19961204051 has 8 divisors (see below), whose sum is σ = 21092743680. Its totient is φ = 18851636232.

The previous prime is 19961204047. The next prime is 19961204071. The reversal of 19961204051 is 15040216991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19961204051 - 2² = 19961204047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19961203996 and 19961204014.

It is not an unprimeable number, because it can be changed into a prime (19961204071) 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 7 ways as a sum of consecutive naturals, for example, 5491085 + ... + 5494718.

It is an arithmetic number, because the mean of its divisors is an integer number (2636592960).

Almost surely, 2^19961204051 is an apocalyptic number.

19961204051 is a deficient number, since it is larger than the sum of its proper divisors (1131539629).

19961204051 is a wasteful number, since it uses less digits than its factorization.

19961204051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10985905.

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 19961204051 in words is "nineteen billion, nine hundred sixty-one million, two hundred four thousand, fifty-one".