20529104143 has 2 divisors, whose sum is σ = 20529104144. Its totient is φ = 20529104142.

The previous prime is 20529104129. The next prime is 20529104159. The reversal of 20529104143 is 34140192502.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20529104143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20529104543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10264552071 + 10264552072.

It is an arithmetic number, because the mean of its divisors is an integer number (10264552072).

Almost surely, 2^20529104143 is an apocalyptic number.

20529104143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20529104143 is an equidigital number, since it uses as much as digits as its factorization.

20529104143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

Adding to 20529104143 its reverse (34140192502), we get a palindrome (54669296645).

The spelling of 20529104143 in words is "twenty billion, five hundred twenty-nine million, one hundred four thousand, one hundred forty-three".