20021341443253 has 2 divisors, whose sum is σ = 20021341443254. Its totient is φ = 20021341443252.

The previous prime is 20021341443203. The next prime is 20021341443277. The reversal of 20021341443253 is 35234414312002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11308914814129 + 8712426629124 = 3362873^2 + 2951682^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021341443253 - 2²⁵ = 20021307888821 is a prime.

It is a super-2 number, since 2×20021341443253² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20021341443203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010670721626 + 10010670721627.

It is an arithmetic number, because the mean of its divisors is an integer number (10010670721627).

Almost surely, 2^{20021341443253} is an apocalyptic number.

It is an amenable number.

20021341443253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021341443253 is an equidigital number, since it uses as much as digits as its factorization.

20021341443253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 20021341443253 its reverse (35234414312002), we get a palindrome (55255755755255).

The spelling of 20021341443253 in words is "twenty trillion, twenty-one billion, three hundred forty-one million, four hundred forty-three thousand, two hundred fifty-three".