20455531253 has 2 divisors, whose sum is σ = 20455531254. Its totient is φ = 20455531252.

The previous prime is 20455531199. The next prime is 20455531259. The reversal of 20455531253 is 35213555402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19932357124 + 523174129 = 141182^2 + 22873^2 .

It is a cyclic number.

It is not a de Polignac number, because 20455531253 - 2¹⁰ = 20455530229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20455531259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10227765626 + 10227765627.

It is an arithmetic number, because the mean of its divisors is an integer number (10227765627).

Almost surely, 2^20455531253 is an apocalyptic number.

It is an amenable number.

20455531253 is a deficient number, since it is larger than the sum of its proper divisors (1).

20455531253 is an equidigital number, since it uses as much as digits as its factorization.

20455531253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 20455531253 in words is "twenty billion, four hundred fifty-five million, five hundred thirty-one thousand, two hundred fifty-three".