18475823 has 2 divisors, whose sum is σ = 18475824. Its totient is φ = 18475822.

The previous prime is 18475817. The next prime is 18475837. The reversal of 18475823 is 32857481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18475823 - 2¹² = 18471727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18472823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9237911 + 9237912.

It is an arithmetic number, because the mean of its divisors is an integer number (9237912).

Almost surely, 2^18475823 is an apocalyptic number.

18475823 is a deficient number, since it is larger than the sum of its proper divisors (1).

18475823 is an equidigital number, since it uses as much as digits as its factorization.

18475823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 38.

The square root of 18475823 is about 4298.3511955167. The cubic root of 18475823 is about 264.3633608022.

The spelling of 18475823 in words is "eighteen million, four hundred seventy-five thousand, eight hundred twenty-three".