18234473 has 2 divisors, whose sum is σ = 18234474. Its totient is φ = 18234472.

The previous prime is 18234467. The next prime is 18234493. The reversal of 18234473 is 37443281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13337104 + 4897369 = 3652^2 + 2213^2 .

It is a cyclic number.

It is not a de Polignac number, because 18234473 - 2⁴ = 18234457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (18234443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9117236 + 9117237.

It is an arithmetic number, because the mean of its divisors is an integer number (9117237).

Almost surely, 2^18234473 is an apocalyptic number.

It is an amenable number.

18234473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18234473 is an equidigital number, since it uses as much as digits as its factorization.

18234473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 32.

The square root of 18234473 is about 4270.1841880650. The cubic root of 18234473 is about 263.2071839655.

The spelling of 18234473 in words is "eighteen million, two hundred thirty-four thousand, four hundred seventy-three".