20553515033 has 2 divisors, whose sum is σ = 20553515034. Its totient is φ = 20553515032.

The previous prime is 20553514939. The next prime is 20553515039. The reversal of 20553515033 is 33051535502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14477624329 + 6075890704 = 120323^2 + 77948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20553515033 is a prime.

It is not a weakly prime, because it can be changed into another prime (20553515039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276757516 + 10276757517.

It is an arithmetic number, because the mean of its divisors is an integer number (10276757517).

Almost surely, 2^20553515033 is an apocalyptic number.

It is an amenable number.

20553515033 is a deficient number, since it is larger than the sum of its proper divisors (1).

20553515033 is an equidigital number, since it uses as much as digits as its factorization.

20553515033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33750, while the sum is 32.

The spelling of 20553515033 in words is "twenty billion, five hundred fifty-three million, five hundred fifteen thousand, thirty-three".