20876841553 has 2 divisors, whose sum is σ = 20876841554. Its totient is φ = 20876841552.

The previous prime is 20876841529. The next prime is 20876841647. The reversal of 20876841553 is 35514867802.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19083488449 + 1793353104 = 138143^2 + 42348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20876841553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20876841497 and 20876841506.

It is not a weakly prime, because it can be changed into another prime (20876844553) 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, 10438420776 + 10438420777.

It is an arithmetic number, because the mean of its divisors is an integer number (10438420777).

Almost surely, 2^20876841553 is an apocalyptic number.

It is an amenable number.

20876841553 is a deficient number, since it is larger than the sum of its proper divisors (1).

20876841553 is an equidigital number, since it uses as much as digits as its factorization.

20876841553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 20876841553 in words is "twenty billion, eight hundred seventy-six million, eight hundred forty-one thousand, five hundred fifty-three".