20543025034009 has 2 divisors, whose sum is σ = 20543025034010. Its totient is φ = 20543025034008.

The previous prime is 20543025034003. The next prime is 20543025034033. The reversal of 20543025034009 is 90043052034502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18929921827609 + 1613103206400 = 4350853^2 + 1270080^2 .

It is a cyclic number.

It is not a de Polignac number, because 20543025034009 - 2¹¹ = 20543025031961 is a prime.

It is a super-2 number, since 2×20543025034009² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20543025034003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10271512517004 + 10271512517005.

It is an arithmetic number, because the mean of its divisors is an integer number (10271512517005).

Almost surely, 2^{20543025034009} is an apocalyptic number.

It is an amenable number.

20543025034009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20543025034009 is an equidigital number, since it uses as much as digits as its factorization.

20543025034009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 20543025034009 in words is "twenty trillion, five hundred forty-three billion, twenty-five million, thirty-four thousand, nine".