20420023308049 has 2 divisors, whose sum is σ = 20420023308050. Its totient is φ = 20420023308048.

The previous prime is 20420023308019. The next prime is 20420023308059. The reversal of 20420023308049 is 94080332002402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20154200571649 + 265822736400 = 4489343^2 + 515580^2 .

It is a cyclic number.

It is not a de Polignac number, because 20420023308049 - 2²⁹ = 20419486437137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20420023307999 and 20420023308017.

It is not a weakly prime, because it can be changed into another prime (20420023308019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10210011654024 + 10210011654025.

It is an arithmetic number, because the mean of its divisors is an integer number (10210011654025).

Almost surely, 2^{20420023308049} is an apocalyptic number.

It is an amenable number.

20420023308049 is a deficient number, since it is larger than the sum of its proper divisors (1).

20420023308049 is an equidigital number, since it uses as much as digits as its factorization.

20420023308049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 20420023308049 in words is "twenty trillion, four hundred twenty billion, twenty-three million, three hundred eight thousand, forty-nine".