20244451526021 has 2 divisors, whose sum is σ = 20244451526022. Its totient is φ = 20244451526020.

The previous prime is 20244451525967. The next prime is 20244451526027. The reversal of 20244451526021 is 12062515444202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12959640002500 + 7284811523521 = 3599950^2 + 2699039^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20244451526021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20244451526027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10122225763010 + 10122225763011.

It is an arithmetic number, because the mean of its divisors is an integer number (10122225763011).

Almost surely, 2^{20244451526021} is an apocalyptic number.

It is an amenable number.

20244451526021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20244451526021 is an equidigital number, since it uses as much as digits as its factorization.

20244451526021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153600, while the sum is 38.

The spelling of 20244451526021 in words is "twenty trillion, two hundred forty-four billion, four hundred fifty-one million, five hundred twenty-six thousand, twenty-one".