19948194774745 has 8 divisors (see below), whose sum is σ = 23951214307080. Its totient is φ = 15949635434880.

The previous prime is 19948194774719. The next prime is 19948194774791. The reversal of 19948194774745 is 54747749184991.

It can be written as a sum of positive squares in 4 ways, for example, as 9153480822784 + 10794713951961 = 3025472^2 + 3285531^2 .

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

It is not a de Polignac number, because 19948194774745 - 2¹³ = 19948194766553 is a prime.

It is an unprimeable number.

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, 1115038276 + ... + 1115056165.

It is an arithmetic number, because the mean of its divisors is an integer number (2993901788385).

Almost surely, 2^{19948194774745} is an apocalyptic number.

It is an amenable number.

19948194774745 is a deficient number, since it is larger than the sum of its proper divisors (4003019532335).

19948194774745 is a wasteful number, since it uses less digits than its factorization.

19948194774745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230096235.

The product of its digits is 2560481280, while the sum is 79.

The spelling of 19948194774745 in words is "nineteen trillion, nine hundred forty-eight billion, one hundred ninety-four million, seven hundred seventy-four thousand, seven hundred forty-five".