18335020553 has 2 divisors, whose sum is σ = 18335020554. Its totient is φ = 18335020552.

The previous prime is 18335020519. The next prime is 18335020567. The reversal of 18335020553 is 35502053381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18304195849 + 30824704 = 135293^2 + 5552^2 .

It is a cyclic number.

It is not a de Polignac number, because 18335020553 - 2¹⁶ = 18334955017 is a prime.

It is not a weakly prime, because it can be changed into another prime (18335020573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9167510276 + 9167510277.

It is an arithmetic number, because the mean of its divisors is an integer number (9167510277).

Almost surely, 2^18335020553 is an apocalyptic number.

It is an amenable number.

18335020553 is a deficient number, since it is larger than the sum of its proper divisors (1).

18335020553 is an equidigital number, since it uses as much as digits as its factorization.

18335020553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 18335020553 in words is "eighteen billion, three hundred thirty-five million, twenty thousand, five hundred fifty-three".