18723364277 has 2 divisors, whose sum is σ = 18723364278. Its totient is φ = 18723364276.

The previous prime is 18723364241. The next prime is 18723364369. The reversal of 18723364277 is 77246332781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12859786801 + 5863577476 = 113401^2 + 76574^2 .

It is a cyclic number.

It is not a de Polignac number, because 18723364277 - 2¹⁴ = 18723347893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18723364577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9361682138 + 9361682139.

It is an arithmetic number, because the mean of its divisors is an integer number (9361682139).

Almost surely, 2^18723364277 is an apocalyptic number.

It is an amenable number.

18723364277 is a deficient number, since it is larger than the sum of its proper divisors (1).

18723364277 is an equidigital number, since it uses as much as digits as its factorization.

18723364277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2370816, while the sum is 50.

The spelling of 18723364277 in words is "eighteen billion, seven hundred twenty-three million, three hundred sixty-four thousand, two hundred seventy-seven".