20105535544253 has 2 divisors, whose sum is σ = 20105535544254. Its totient is φ = 20105535544252.

The previous prime is 20105535544243. The next prime is 20105535544309. The reversal of 20105535544253 is 35244553550102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19091673837604 + 1013861706649 = 4369402^2 + 1006907^2 .

It is a cyclic number.

It is not a de Polignac number, because 20105535544253 - 2⁶ = 20105535544189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20105535544223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052767772126 + 10052767772127.

It is an arithmetic number, because the mean of its divisors is an integer number (10052767772127).

Almost surely, 2^{20105535544253} is an apocalyptic number.

It is an amenable number.

20105535544253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20105535544253 is an equidigital number, since it uses as much as digits as its factorization.

20105535544253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800000, while the sum is 44.

The spelling of 20105535544253 in words is "twenty trillion, one hundred five billion, five hundred thirty-five million, five hundred forty-four thousand, two hundred fifty-three".