18490417 has 16 divisors (see below), whose sum is σ = 20913984. Its totient is φ = 16200000.

The previous prime is 18490397. The next prime is 18490421. The reversal of 18490417 is 71409481.

It is a cyclic number.

It is not a de Polignac number, because 18490417 - 2¹⁹ = 17966129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18490427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73542 + ... + 73792.

It is an arithmetic number, because the mean of its divisors is an integer number (1307124).

Almost surely, 2^18490417 is an apocalyptic number.

It is an amenable number.

18490417 is a deficient number, since it is larger than the sum of its proper divisors (2423567).

18490417 is a wasteful number, since it uses less digits than its factorization.

18490417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 18490417 is about 4300.0484880987. The cubic root of 18490417 is about 264.4329491050.

Adding to 18490417 its reverse (71409481), we get a palindrome (89899898).

It can be divided in two parts, 184 and 90417, that added together give a square (90601 = 301²).

The spelling of 18490417 in words is "eighteen million, four hundred ninety thousand, four hundred seventeen".