18649543093 has 2 divisors, whose sum is σ = 18649543094. Its totient is φ = 18649543092.

The previous prime is 18649543069. The next prime is 18649543111. The reversal of 18649543093 is 39034594681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15286355044 + 3363188049 = 123638^2 + 57993^2 .

It is a cyclic number.

It is not a de Polignac number, because 18649543093 - 2⁵ = 18649543061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18649543093.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18649543013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9324771546 + 9324771547.

It is an arithmetic number, because the mean of its divisors is an integer number (9324771547).

Almost surely, 2^18649543093 is an apocalyptic number.

It is an amenable number.

18649543093 is a deficient number, since it is larger than the sum of its proper divisors (1).

18649543093 is an equidigital number, since it uses as much as digits as its factorization.

18649543093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 18649543093 in words is "eighteen billion, six hundred forty-nine million, five hundred forty-three thousand, ninety-three".