20411443231409 has 2 divisors, whose sum is σ = 20411443231410. Its totient is φ = 20411443231408.

The previous prime is 20411443231391. The next prime is 20411443231423. The reversal of 20411443231409 is 90413234411402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20369470695025 + 41972536384 = 4513255^2 + 204872^2 .

It is a cyclic number.

It is not a de Polignac number, because 20411443231409 - 2¹² = 20411443227313 is a prime.

It is not a weakly prime, because it can be changed into another prime (20411443231469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10205721615704 + 10205721615705.

It is an arithmetic number, because the mean of its divisors is an integer number (10205721615705).

Almost surely, 2^{20411443231409} is an apocalyptic number.

It is an amenable number.

20411443231409 is a deficient number, since it is larger than the sum of its proper divisors (1).

20411443231409 is an equidigital number, since it uses as much as digits as its factorization.

20411443231409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 20411443231409 in words is "twenty trillion, four hundred eleven billion, four hundred forty-three million, two hundred thirty-one thousand, four hundred nine".