19948194774743 has 16 divisors (see below), whose sum is σ = 20224232878080. Its totient is φ = 19672750371456.

The previous prime is 19948194774719. The next prime is 19948194774791. The reversal of 19948194774743 is 34747749184991.

It is a cyclic number.

It is not a de Polignac number, because 19948194774743 - 2¹⁶ = 19948194709207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19948194774643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 888668546 + ... + 888690992.

It is an arithmetic number, because the mean of its divisors is an integer number (1264014554880).

Almost surely, 2^{19948194774743} is an apocalyptic number.

19948194774743 is a deficient number, since it is larger than the sum of its proper divisors (276038103337).

19948194774743 is a wasteful number, since it uses less digits than its factorization.

19948194774743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35126.

The product of its digits is 1536288768, while the sum is 77.

The spelling of 19948194774743 in words is "nineteen trillion, nine hundred forty-eight billion, one hundred ninety-four million, seven hundred seventy-four thousand, seven hundred forty-three".