20630305543 has 2 divisors, whose sum is σ = 20630305544. Its totient is φ = 20630305542.

The previous prime is 20630305541. The next prime is 20630305547. The reversal of 20630305543 is 34550303602.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20630305543 - 2¹ = 20630305541 is a prime.

Together with 20630305541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20630305541) 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, 10315152771 + 10315152772.

It is an arithmetic number, because the mean of its divisors is an integer number (10315152772).

Almost surely, 2^20630305543 is an apocalyptic number.

20630305543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20630305543 is an equidigital number, since it uses as much as digits as its factorization.

20630305543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 31.

The spelling of 20630305543 in words is "twenty billion, six hundred thirty million, three hundred five thousand, five hundred forty-three".