18915000323 has 2 divisors, whose sum is σ = 18915000324. Its totient is φ = 18915000322.

The previous prime is 18915000301. The next prime is 18915000359. The reversal of 18915000323 is 32300051981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18915000323 - 2⁶ = 18915000259 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18915000323.

It is not a weakly prime, because it can be changed into another prime (18915000523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9457500161 + 9457500162.

It is an arithmetic number, because the mean of its divisors is an integer number (9457500162).

Almost surely, 2^18915000323 is an apocalyptic number.

18915000323 is a deficient number, since it is larger than the sum of its proper divisors (1).

18915000323 is an equidigital number, since it uses as much as digits as its factorization.

18915000323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 18915000323 in words is "eighteen billion, nine hundred fifteen million, three hundred twenty-three", and thus it is an aban number.