20251453543 has 2 divisors, whose sum is σ = 20251453544. Its totient is φ = 20251453542.

The previous prime is 20251453489. The next prime is 20251453559. The reversal of 20251453543 is 34535415202.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20251453543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20251453499 and 20251453508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20251451543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10125726771 + 10125726772.

It is an arithmetic number, because the mean of its divisors is an integer number (10125726772).

Almost surely, 2^20251453543 is an apocalyptic number.

20251453543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20251453543 is an equidigital number, since it uses as much as digits as its factorization.

20251453543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 20251453543 its reverse (34535415202), we get a palindrome (54786868745).

The spelling of 20251453543 in words is "twenty billion, two hundred fifty-one million, four hundred fifty-three thousand, five hundred forty-three".