20329403661811 has 2 divisors, whose sum is σ = 20329403661812. Its totient is φ = 20329403661810.

The previous prime is 20329403661799. The next prime is 20329403661943. The reversal of 20329403661811 is 11816630492302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20329403661811 - 2¹⁹ = 20329403137523 is a prime.

It is not a weakly prime, because it can be changed into another prime (20329403661211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10164701830905 + 10164701830906.

It is an arithmetic number, because the mean of its divisors is an integer number (10164701830906).

Almost surely, 2^{20329403661811} is an apocalyptic number.

20329403661811 is a deficient number, since it is larger than the sum of its proper divisors (1).

20329403661811 is an equidigital number, since it uses as much as digits as its factorization.

20329403661811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 20329403661811 in words is "twenty trillion, three hundred twenty-nine billion, four hundred three million, six hundred sixty-one thousand, eight hundred eleven".