18802123 has 2 divisors, whose sum is σ = 18802124. Its totient is φ = 18802122.

The previous prime is 18802081. The next prime is 18802141. The reversal of 18802123 is 32120881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18802123 - 2⁹ = 18801611 is a prime.

It is not a weakly prime, because it can be changed into another prime (18802193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9401061 + 9401062.

It is an arithmetic number, because the mean of its divisors is an integer number (9401062).

Almost surely, 2^18802123 is an apocalyptic number.

18802123 is a deficient number, since it is larger than the sum of its proper divisors (1).

18802123 is an equidigital number, since it uses as much as digits as its factorization.

18802123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 18802123 is about 4336.1414875440. The cubic root of 18802123 is about 265.9105876583.

The spelling of 18802123 in words is "eighteen million, eight hundred two thousand, one hundred twenty-three".