18553994743 has 2 divisors, whose sum is σ = 18553994744. Its totient is φ = 18553994742.

The previous prime is 18553994689. The next prime is 18553994761. The reversal of 18553994743 is 34749935581.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18553994743 - 2⁹ = 18553994231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18553994243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9276997371 + 9276997372.

It is an arithmetic number, because the mean of its divisors is an integer number (9276997372).

Almost surely, 2^18553994743 is an apocalyptic number.

18553994743 is a deficient number, since it is larger than the sum of its proper divisors (1).

18553994743 is an equidigital number, since it uses as much as digits as its factorization.

18553994743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16329600, while the sum is 58.

The spelling of 18553994743 in words is "eighteen billion, five hundred fifty-three million, nine hundred ninety-four thousand, seven hundred forty-three".