18059473 has 2 divisors, whose sum is σ = 18059474. Its totient is φ = 18059472.

The previous prime is 18059429. The next prime is 18059497. The reversal of 18059473 is 37495081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17073424 + 986049 = 4132^2 + 993^2 .

It is a cyclic number.

It is not a de Polignac number, because 18059473 - 2⁹ = 18058961 is a prime.

It is a super-2 number, since 2×18059473² = 652289130075458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18059413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9029736 + 9029737.

It is an arithmetic number, because the mean of its divisors is an integer number (9029737).

Almost surely, 2^18059473 is an apocalyptic number.

It is an amenable number.

18059473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18059473 is an equidigital number, since it uses as much as digits as its factorization.

18059473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 18059473 is about 4249.6438674317. The cubic root of 18059473 is about 262.3624579523.

It can be divided in two parts, 1805947 and 3, that added together give a triangular number (1805950 = T₁₉₀₀).

The spelling of 18059473 in words is "eighteen million, fifty-nine thousand, four hundred seventy-three".