20534454541 has 2 divisors, whose sum is σ = 20534454542. Its totient is φ = 20534454540.

The previous prime is 20534454539. The next prime is 20534454553. The reversal of 20534454541 is 14545443502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19391676516 + 1142778025 = 139254^2 + 33805^2 .

It is a cyclic number.

It is not a de Polignac number, because 20534454541 - 2¹ = 20534454539 is a prime.

Together with 20534454539, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20534454541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20534454841) 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, 10267227270 + 10267227271.

It is an arithmetic number, because the mean of its divisors is an integer number (10267227271).

Almost surely, 2^20534454541 is an apocalyptic number.

It is an amenable number.

20534454541 is a deficient number, since it is larger than the sum of its proper divisors (1).

20534454541 is an equidigital number, since it uses as much as digits as its factorization.

20534454541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192000, while the sum is 37.

The spelling of 20534454541 in words is "twenty billion, five hundred thirty-four million, four hundred fifty-four thousand, five hundred forty-one".