18854497 has 4 divisors (see below), whose sum is σ = 19364116. Its totient is φ = 18344880.

The previous prime is 18854483. The next prime is 18854501. The reversal of 18854497 is 79445881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8767521 + 10086976 = 2961^2 + 3176^2 .

It is a cyclic number.

It is not a de Polignac number, because 18854497 - 2⁷ = 18854369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18854477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254754 + ... + 254827.

It is an arithmetic number, because the mean of its divisors is an integer number (4841029).

Almost surely, 2^18854497 is an apocalyptic number.

It is an amenable number.

18854497 is a deficient number, since it is larger than the sum of its proper divisors (509619).

18854497 is an equidigital number, since it uses as much as digits as its factorization.

18854497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509618.

The product of its digits is 322560, while the sum is 46.

The square root of 18854497 is about 4342.1765279638. The cubic root of 18854497 is about 266.1572599780.

The spelling of 18854497 in words is "eighteen million, eight hundred fifty-four thousand, four hundred ninety-seven".