20054102489 has 2 divisors, whose sum is σ = 20054102490. Its totient is φ = 20054102488.

The previous prime is 20054102413. The next prime is 20054102503. The reversal of 20054102489 is 98420145002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10651891264 + 9402211225 = 103208^2 + 96965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20054102489 is a prime.

It is not a weakly prime, because it can be changed into another prime (20054102689) 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, 10027051244 + 10027051245.

It is an arithmetic number, because the mean of its divisors is an integer number (10027051245).

Almost surely, 2^20054102489 is an apocalyptic number.

It is an amenable number.

20054102489 is a deficient number, since it is larger than the sum of its proper divisors (1).

20054102489 is an equidigital number, since it uses as much as digits as its factorization.

20054102489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 20054102489 in words is "twenty billion, fifty-four million, one hundred two thousand, four hundred eighty-nine".