20430626543 has 2 divisors, whose sum is σ = 20430626544. Its totient is φ = 20430626542.

The previous prime is 20430626533. The next prime is 20430626549. The reversal of 20430626543 is 34562603402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20430626543 - 2⁸ = 20430626287 is a prime.

It is a super-2 number, since 2×20430626543² (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 (20430626549) 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, 10215313271 + 10215313272.

It is an arithmetic number, because the mean of its divisors is an integer number (10215313272).

Almost surely, 2^20430626543 is an apocalyptic number.

20430626543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20430626543 is an equidigital number, since it uses as much as digits as its factorization.

20430626543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 35.

The spelling of 20430626543 in words is "twenty billion, four hundred thirty million, six hundred twenty-six thousand, five hundred forty-three".