18783620573 has 2 divisors, whose sum is σ = 18783620574. Its totient is φ = 18783620572.

The previous prime is 18783620521. The next prime is 18783620593. The reversal of 18783620573 is 37502638781.

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., 16972096729 + 1811523844 = 130277^2 + 42562^2 .

It is an emirp because it is prime and its reverse (37502638781) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18783620573 - 2⁶ = 18783620509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18783620593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9391810286 + 9391810287.

It is an arithmetic number, because the mean of its divisors is an integer number (9391810287).

Almost surely, 2^18783620573 is an apocalyptic number.

It is an amenable number.

18783620573 is a deficient number, since it is larger than the sum of its proper divisors (1).

18783620573 is an equidigital number, since it uses as much as digits as its factorization.

18783620573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 18783620573 in words is "eighteen billion, seven hundred eighty-three million, six hundred twenty thousand, five hundred seventy-three".