18667341773 has 2 divisors, whose sum is σ = 18667341774. Its totient is φ = 18667341772.

The previous prime is 18667341769. The next prime is 18667341809. The reversal of 18667341773 is 37714376681.

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., 16128492004 + 2538849769 = 126998^2 + 50387^2 .

It is a cyclic number.

It is not a de Polignac number, because 18667341773 - 2² = 18667341769 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18667341733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9333670886 + 9333670887.

It is an arithmetic number, because the mean of its divisors is an integer number (9333670887).

Almost surely, 2^18667341773 is an apocalyptic number.

It is an amenable number.

18667341773 is a deficient number, since it is larger than the sum of its proper divisors (1).

18667341773 is an equidigital number, since it uses as much as digits as its factorization.

18667341773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 53.

The spelling of 18667341773 in words is "eighteen billion, six hundred sixty-seven million, three hundred forty-one thousand, seven hundred seventy-three".