18472823 has 2 divisors, whose sum is σ = 18472824. Its totient is φ = 18472822.

The previous prime is 18472789. The next prime is 18472849. The reversal of 18472823 is 32827481.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18472823 - 2²⁰ = 17424247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18472873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9236411 + 9236412.

It is an arithmetic number, because the mean of its divisors is an integer number (9236412).

Almost surely, 2^18472823 is an apocalyptic number.

18472823 is a deficient number, since it is larger than the sum of its proper divisors (1).

18472823 is an equidigital number, since it uses as much as digits as its factorization.

18472823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21504, while the sum is 35.

The square root of 18472823 is about 4298.0022103298. The cubic root of 18472823 is about 264.3490514169.

The spelling of 18472823 in words is "eighteen million, four hundred seventy-two thousand, eight hundred twenty-three".