20443949622253 has 4 divisors (see below), whose sum is σ = 20556899620348. Its totient is φ = 20330999624160.

The previous prime is 20443949622247. The next prime is 20443949622293. The reversal of 20443949622253 is 35222694934402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2644646780169 + 17799302842084 = 1626237^2 + 4218922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20443949622253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20443949622194 and 20443949622203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20443949622293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56474998776 + ... + 56474999137.

It is an arithmetic number, because the mean of its divisors is an integer number (5139224905087).

Almost surely, 2^{20443949622253} is an apocalyptic number.

It is an amenable number.

20443949622253 is a deficient number, since it is larger than the sum of its proper divisors (112949998095).

20443949622253 is a wasteful number, since it uses less digits than its factorization.

20443949622253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112949998094.

The product of its (nonzero) digits is 22394880, while the sum is 55.

The spelling of 20443949622253 in words is "twenty trillion, four hundred forty-three billion, nine hundred forty-nine million, six hundred twenty-two thousand, two hundred fifty-three".