19923784141 has 2 divisors, whose sum is σ = 19923784142. Its totient is φ = 19923784140.

The previous prime is 19923784081. The next prime is 19923784211. The reversal of 19923784141 is 14148732991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14974661641 + 4949122500 = 122371^2 + 70350^2 .

It is a cyclic number.

It is not a de Polignac number, because 19923784141 - 2²⁹ = 19386913229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19923734141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9961892070 + 9961892071.

It is an arithmetic number, because the mean of its divisors is an integer number (9961892071).

Almost surely, 2^19923784141 is an apocalyptic number.

It is an amenable number.

19923784141 is a deficient number, since it is larger than the sum of its proper divisors (1).

19923784141 is an equidigital number, since it uses as much as digits as its factorization.

19923784141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The spelling of 19923784141 in words is "nineteen billion, nine hundred twenty-three million, seven hundred eighty-four thousand, one hundred forty-one".