18485473 has 2 divisors, whose sum is σ = 18485474. Its totient is φ = 18485472.

The previous prime is 18485449. The next prime is 18485479. The reversal of 18485473 is 37458481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10712529 + 7772944 = 3273^2 + 2788^2 .

It is a cyclic number.

It is not a de Polignac number, because 18485473 - 2¹³ = 18477281 is a prime.

It is a super-3 number, since 3×18485473³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (18485479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9242736 + 9242737.

It is an arithmetic number, because the mean of its divisors is an integer number (9242737).

Almost surely, 2^18485473 is an apocalyptic number.

It is an amenable number.

18485473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18485473 is an equidigital number, since it uses as much as digits as its factorization.

18485473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 40.

The square root of 18485473 is about 4299.4735724272. The cubic root of 18485473 is about 264.4093788228.

The spelling of 18485473 in words is "eighteen million, four hundred eighty-five thousand, four hundred seventy-three".