18233473 has 2 divisors, whose sum is σ = 18233474. Its totient is φ = 18233472.

The previous prime is 18233471. The next prime is 18233491. The reversal of 18233473 is 37433281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16459249 + 1774224 = 4057^2 + 1332^2 .

It is a cyclic number.

It is not a de Polignac number, because 18233473 - 2¹ = 18233471 is a prime.

Together with 18233471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (18233471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9116736 + 9116737.

It is an arithmetic number, because the mean of its divisors is an integer number (9116737).

Almost surely, 2^18233473 is an apocalyptic number.

It is an amenable number.

18233473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18233473 is an equidigital number, since it uses as much as digits as its factorization.

18233473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 31.

The square root of 18233473 is about 4270.0670954916. The cubic root of 18233473 is about 263.2023723468.

The spelling of 18233473 in words is "eighteen million, two hundred thirty-three thousand, four hundred seventy-three".