20425454453 has 2 divisors, whose sum is σ = 20425454454. Its totient is φ = 20425454452.

The previous prime is 20425454431. The next prime is 20425454473. The reversal of 20425454453 is 35445452402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19076581924 + 1348872529 = 138118^2 + 36727^2 .

It is a cyclic number.

It is not a de Polignac number, because 20425454453 - 2²⁰ = 20424405877 is a prime.

It is a super-2 number, since 2×20425454453² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20425454473) 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, 10212727226 + 10212727227.

It is an arithmetic number, because the mean of its divisors is an integer number (10212727227).

Almost surely, 2^20425454453 is an apocalyptic number.

It is an amenable number.

20425454453 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425454453 is an equidigital number, since it uses as much as digits as its factorization.

20425454453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384000, while the sum is 38.

The spelling of 20425454453 in words is "twenty billion, four hundred twenty-five million, four hundred fifty-four thousand, four hundred fifty-three".