18953818073 has 2 divisors, whose sum is σ = 18953818074. Its totient is φ = 18953818072.

The previous prime is 18953818043. The next prime is 18953818111. The reversal of 18953818073 is 37081835981.

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., 18869967424 + 83850649 = 137368^2 + 9157^2 .

It is an emirp because it is prime and its reverse (37081835981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18953818073 - 2¹⁴ = 18953801689 is a prime.

It is not a weakly prime, because it can be changed into another prime (18953818043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9476909036 + 9476909037.

It is an arithmetic number, because the mean of its divisors is an integer number (9476909037).

Almost surely, 2^18953818073 is an apocalyptic number.

It is an amenable number.

18953818073 is a deficient number, since it is larger than the sum of its proper divisors (1).

18953818073 is an equidigital number, since it uses as much as digits as its factorization.

18953818073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 18953818073 in words is "eighteen billion, nine hundred fifty-three million, eight hundred eighteen thousand, seventy-three".