20543413540589 has 2 divisors, whose sum is σ = 20543413540590. Its totient is φ = 20543413540588.

The previous prime is 20543413540549. The next prime is 20543413540621. The reversal of 20543413540589 is 98504531434502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19004734551364 + 1538678989225 = 4359442^2 + 1240435^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20543413540589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20543413540589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20543413540549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10271706770294 + 10271706770295.

It is an arithmetic number, because the mean of its divisors is an integer number (10271706770295).

Almost surely, 2^{20543413540589} is an apocalyptic number.

It is an amenable number.

20543413540589 is a deficient number, since it is larger than the sum of its proper divisors (1).

20543413540589 is an equidigital number, since it uses as much as digits as its factorization.

20543413540589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368000, while the sum is 53.

The spelling of 20543413540589 in words is "twenty trillion, five hundred forty-three billion, four hundred thirteen million, five hundred forty thousand, five hundred eighty-nine".