20013421014173 has 2 divisors, whose sum is σ = 20013421014174. Its totient is φ = 20013421014172.

The previous prime is 20013421014131. The next prime is 20013421014233. The reversal of 20013421014173 is 37141012431002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11145729144484 + 8867691869689 = 3338522^2 + 2977867^2 .

It is a cyclic number.

It is not a de Polignac number, because 20013421014173 - 2⁸ = 20013421013917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20013421064173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006710507086 + 10006710507087.

It is an arithmetic number, because the mean of its divisors is an integer number (10006710507087).

Almost surely, 2^{20013421014173} is an apocalyptic number.

It is an amenable number.

20013421014173 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013421014173 is an equidigital number, since it uses as much as digits as its factorization.

20013421014173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 20013421014173 its reverse (37141012431002), we get a palindrome (57154433445175).

The spelling of 20013421014173 in words is "twenty trillion, thirteen billion, four hundred twenty-one million, fourteen thousand, one hundred seventy-three".