18474373 has 2 divisors, whose sum is σ = 18474374. Its totient is φ = 18474372.

The previous prime is 18474371. The next prime is 18474377. The reversal of 18474373 is 37347481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13082689 + 5391684 = 3617^2 + 2322^2 .

It is an emirp because it is prime and its reverse (37347481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18474373 - 2¹ = 18474371 is a prime.

Together with 18474371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18474371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9237186 + 9237187.

It is an arithmetic number, because the mean of its divisors is an integer number (9237187).

Almost surely, 2^18474373 is an apocalyptic number.

It is an amenable number.

18474373 is a deficient number, since it is larger than the sum of its proper divisors (1).

18474373 is an equidigital number, since it uses as much as digits as its factorization.

18474373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 37.

The square root of 18474373 is about 4298.1825228810. The cubic root of 18474373 is about 264.3564447927.

The spelling of 18474373 in words is "eighteen million, four hundred seventy-four thousand, three hundred seventy-three".