19795945931243 has 2 divisors, whose sum is σ = 19795945931244. Its totient is φ = 19795945931242.

The previous prime is 19795945931219. The next prime is 19795945931309. The reversal of 19795945931243 is 34213954959791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19795945931243 - 2¹⁰ = 19795945930219 is a prime.

It is not a weakly prime, because it can be changed into another prime (19795945933243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9897972965621 + 9897972965622.

It is an arithmetic number, because the mean of its divisors is an integer number (9897972965622).

Almost surely, 2^{19795945931243} is an apocalyptic number.

19795945931243 is a deficient number, since it is larger than the sum of its proper divisors (1).

19795945931243 is an equidigital number, since it uses as much as digits as its factorization.

19795945931243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 330674400, while the sum is 71.

The spelling of 19795945931243 in words is "nineteen trillion, seven hundred ninety-five billion, nine hundred forty-five million, nine hundred thirty-one thousand, two hundred forty-three".