18383729453 has 2 divisors, whose sum is σ = 18383729454. Its totient is φ = 18383729452.

The previous prime is 18383729447. The next prime is 18383729473. The reversal of 18383729453 is 35492738381.

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., 10240832809 + 8142896644 = 101197^2 + 90238^2 .

It is a cyclic number.

It is not a de Polignac number, because 18383729453 - 2³² = 14088762157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18383729395 and 18383729404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18383729443) 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, 9191864726 + 9191864727.

It is an arithmetic number, because the mean of its divisors is an integer number (9191864727).

Almost surely, 2^18383729453 is an apocalyptic number.

It is an amenable number.

18383729453 is a deficient number, since it is larger than the sum of its proper divisors (1).

18383729453 is an equidigital number, since it uses as much as digits as its factorization.

18383729453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 53.

The spelling of 18383729453 in words is "eighteen billion, three hundred eighty-three million, seven hundred twenty-nine thousand, four hundred fifty-three".