20013202044257 has 2 divisors, whose sum is σ = 20013202044258. Its totient is φ = 20013202044256.

The previous prime is 20013202044229. The next prime is 20013202044271. The reversal of 20013202044257 is 75244020231002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15709419447121 + 4303782597136 = 3963511^2 + 2074556^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013202044257 is a prime.

It is not a weakly prime, because it can be changed into another prime (20013202040257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006601022128 + 10006601022129.

It is an arithmetic number, because the mean of its divisors is an integer number (10006601022129).

Almost surely, 2^{20013202044257} is an apocalyptic number.

It is an amenable number.

20013202044257 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013202044257 is an equidigital number, since it uses as much as digits as its factorization.

20013202044257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 32.

Adding to 20013202044257 its reverse (75244020231002), we get a palindrome (95257222275259).

The spelling of 20013202044257 in words is "twenty trillion, thirteen billion, two hundred two million, forty-four thousand, two hundred fifty-seven".