20380576554449 has 2 divisors, whose sum is σ = 20380576554450. Its totient is φ = 20380576554448.

The previous prime is 20380576554413. The next prime is 20380576554463. The reversal of 20380576554449 is 94445567508302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15861580675600 + 4518995878849 = 3982660^2 + 2125793^2 .

It is a cyclic number.

It is not a de Polignac number, because 20380576554449 - 2⁸ = 20380576554193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20380576554391 and 20380576554400.

It is not a weakly prime, because it can be changed into another prime (20380576554049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10190288277224 + 10190288277225.

It is an arithmetic number, because the mean of its divisors is an integer number (10190288277225).

Almost surely, 2^{20380576554449} is an apocalyptic number.

It is an amenable number.

20380576554449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20380576554449 is an equidigital number, since it uses as much as digits as its factorization.

20380576554449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152000, while the sum is 62.

The spelling of 20380576554449 in words is "twenty trillion, three hundred eighty billion, five hundred seventy-six million, five hundred fifty-four thousand, four hundred forty-nine".