18996041473 has 2 divisors, whose sum is σ = 18996041474. Its totient is φ = 18996041472.

The previous prime is 18996041443. The next prime is 18996041489. The reversal of 18996041473 is 37414069981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17663207409 + 1332834064 = 132903^2 + 36508^2 .

It is a cyclic number.

It is not a de Polignac number, because 18996041473 - 2⁹ = 18996040961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18996041473.

It is not a weakly prime, because it can be changed into another prime (18996041413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9498020736 + 9498020737.

It is an arithmetic number, because the mean of its divisors is an integer number (9498020737).

Almost surely, 2^18996041473 is an apocalyptic number.

It is an amenable number.

18996041473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18996041473 is an equidigital number, since it uses as much as digits as its factorization.

18996041473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 18996041473 in words is "eighteen billion, nine hundred ninety-six million, forty-one thousand, four hundred seventy-three".