18459473 has 2 divisors, whose sum is σ = 18459474. Its totient is φ = 18459472.

The previous prime is 18459407. The next prime is 18459479. The reversal of 18459473 is 37495481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14684224 + 3775249 = 3832^2 + 1943^2 .

It is an emirp because it is prime and its reverse (37495481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18459473 - 2¹⁶ = 18393937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18459473.

It is not a weakly prime, because it can be changed into another prime (18459479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9229736 + 9229737.

It is an arithmetic number, because the mean of its divisors is an integer number (9229737).

Almost surely, 2^18459473 is an apocalyptic number.

It is an amenable number.

18459473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18459473 is an equidigital number, since it uses as much as digits as its factorization.

18459473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 18459473 is about 4296.4488825075. The cubic root of 18459473 is about 264.2853558588.

The spelling of 18459473 in words is "eighteen million, four hundred fifty-nine thousand, four hundred seventy-three".