18874417 has 2 divisors, whose sum is σ = 18874418. Its totient is φ = 18874416.

The previous prime is 18874411. The next prime is 18874423. The reversal of 18874417 is 71447881.

It is a balanced prime because it is at equal distance from previous prime (18874411) and next prime (18874423).

It can be written as a sum of positive squares in only one way, i.e., 14447601 + 4426816 = 3801^2 + 2104^2 .

It is a cyclic number.

It is not a de Polignac number, because 18874417 - 2¹⁵ = 18841649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18874417.

It is not a weakly prime, because it can be changed into another prime (18874411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9437208 + 9437209.

It is an arithmetic number, because the mean of its divisors is an integer number (9437209).

Almost surely, 2^18874417 is an apocalyptic number.

It is an amenable number.

18874417 is a deficient number, since it is larger than the sum of its proper divisors (1).

18874417 is an equidigital number, since it uses as much as digits as its factorization.

18874417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50176, while the sum is 40.

The square root of 18874417 is about 4344.4697029672. The cubic root of 18874417 is about 266.2509597561.

It can be divided in two parts, 18874 and 417, that added together give a palindrome (19291).

The spelling of 18874417 in words is "eighteen million, eight hundred seventy-four thousand, four hundred seventeen".