18548446673 has 2 divisors, whose sum is σ = 18548446674. Its totient is φ = 18548446672.

The previous prime is 18548446643. The next prime is 18548446753. The reversal of 18548446673 is 37664484581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18226890049 + 321556624 = 135007^2 + 17932^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18548446673 is a prime.

It is a super-2 number, since 2×18548446673² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18548446643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9274223336 + 9274223337.

It is an arithmetic number, because the mean of its divisors is an integer number (9274223337).

Almost surely, 2^18548446673 is an apocalyptic number.

It is an amenable number.

18548446673 is a deficient number, since it is larger than the sum of its proper divisors (1).

18548446673 is an equidigital number, since it uses as much as digits as its factorization.

18548446673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15482880, while the sum is 56.

The spelling of 18548446673 in words is "eighteen billion, five hundred forty-eight million, four hundred forty-six thousand, six hundred seventy-three".