18771585323 has 2 divisors, whose sum is σ = 18771585324. Its totient is φ = 18771585322.

The previous prime is 18771585307. The next prime is 18771585359. The reversal of 18771585323 is 32358517781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18771585323 - 2⁴ = 18771585307 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18771585923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9385792661 + 9385792662.

It is an arithmetic number, because the mean of its divisors is an integer number (9385792662).

Almost surely, 2^18771585323 is an apocalyptic number.

18771585323 is a deficient number, since it is larger than the sum of its proper divisors (1).

18771585323 is an equidigital number, since it uses as much as digits as its factorization.

18771585323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1411200, while the sum is 50.

The spelling of 18771585323 in words is "eighteen billion, seven hundred seventy-one million, five hundred eighty-five thousand, three hundred twenty-three".