18704461 has 2 divisors, whose sum is σ = 18704462. Its totient is φ = 18704460.

The previous prime is 18704459. The next prime is 18704467. The reversal of 18704461 is 16440781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15848361 + 2856100 = 3981^2 + 1690^2 .

It is a cyclic number.

It is not a de Polignac number, because 18704461 - 2¹ = 18704459 is a prime.

It is a super-3 number, since 3×18704461³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 18704459, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18704467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9352230 + 9352231.

It is an arithmetic number, because the mean of its divisors is an integer number (9352231).

Almost surely, 2^18704461 is an apocalyptic number.

It is an amenable number.

18704461 is a deficient number, since it is larger than the sum of its proper divisors (1).

18704461 is an equidigital number, since it uses as much as digits as its factorization.

18704461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18704461 is about 4324.8654314325. The cubic root of 18704461 is about 265.4493905660.

The spelling of 18704461 in words is "eighteen million, seven hundred four thousand, four hundred sixty-one".