20552434543 has 2 divisors, whose sum is σ = 20552434544. Its totient is φ = 20552434542.

The previous prime is 20552434537. The next prime is 20552434561. The reversal of 20552434543 is 34543425502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20552434543 - 2²¹ = 20550337391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20552434523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276217271 + 10276217272.

It is an arithmetic number, because the mean of its divisors is an integer number (10276217272).

Almost surely, 2^20552434543 is an apocalyptic number.

20552434543 is a deficient number, since it is larger than the sum of its proper divisors (1).

20552434543 is an equidigital number, since it uses as much as digits as its factorization.

20552434543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 37.

The spelling of 20552434543 in words is "twenty billion, five hundred fifty-two million, four hundred thirty-four thousand, five hundred forty-three".