18811598453 has 2 divisors, whose sum is σ = 18811598454. Its totient is φ = 18811598452.

The previous prime is 18811598411. The next prime is 18811598471. The reversal of 18811598453 is 35489511881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15256696324 + 3554902129 = 123518^2 + 59623^2 .

It is a cyclic number.

It is not a de Polignac number, because 18811598453 - 2⁶ = 18811598389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18811598395 and 18811598404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18811598473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9405799226 + 9405799227.

It is an arithmetic number, because the mean of its divisors is an integer number (9405799227).

Almost surely, 2^18811598453 is an apocalyptic number.

It is an amenable number.

18811598453 is a deficient number, since it is larger than the sum of its proper divisors (1).

18811598453 is an equidigital number, since it uses as much as digits as its factorization.

18811598453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 53.

The spelling of 18811598453 in words is "eighteen billion, eight hundred eleven million, five hundred ninety-eight thousand, four hundred fifty-three".