18371473 has 2 divisors, whose sum is σ = 18371474. Its totient is φ = 18371472.

The previous prime is 18371453. The next prime is 18371489. The reversal of 18371473 is 37417381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9443329 + 8928144 = 3073^2 + 2988^2 .

It is a cyclic number.

It is not a de Polignac number, because 18371473 - 2¹⁷ = 18240401 is a prime.

It is a super-2 number, since 2×18371473² = 675022040379458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18371453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9185736 + 9185737.

It is an arithmetic number, because the mean of its divisors is an integer number (9185737).

Almost surely, 2^18371473 is an apocalyptic number.

It is an amenable number.

18371473 is a deficient number, since it is larger than the sum of its proper divisors (1).

18371473 is an equidigital number, since it uses as much as digits as its factorization.

18371473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 18371473 is about 4286.1956324928. The cubic root of 18371473 is about 263.8647196791.

The spelling of 18371473 in words is "eighteen million, three hundred seventy-one thousand, four hundred seventy-three".