18468917 has 2 divisors, whose sum is σ = 18468918. Its totient is φ = 18468916.

The previous prime is 18468899. The next prime is 18468941. The reversal of 18468917 is 71986481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15928081 + 2540836 = 3991^2 + 1594^2 .

It is a cyclic number.

It is not a de Polignac number, because 18468917 - 2¹⁰ = 18467893 is a prime.

It is a super-2 number, since 2×18468917² = 682201790305778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18468017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9234458 + 9234459.

It is an arithmetic number, because the mean of its divisors is an integer number (9234459).

Almost surely, 2^18468917 is an apocalyptic number.

It is an amenable number.

18468917 is a deficient number, since it is larger than the sum of its proper divisors (1).

18468917 is an equidigital number, since it uses as much as digits as its factorization.

18468917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 44.

The square root of 18468917 is about 4297.5477891467. The cubic root of 18468917 is about 264.3304182753.

The spelling of 18468917 in words is "eighteen million, four hundred sixty-eight thousand, nine hundred seventeen".