18650461 has 2 divisors, whose sum is σ = 18650462. Its totient is φ = 18650460.

The previous prime is 18650441. The next prime is 18650473. The reversal of 18650461 is 16405681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18020025 + 630436 = 4245^2 + 794^2 .

It is an emirp because it is prime and its reverse (16405681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18650461 - 2¹³ = 18642269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18650441) 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 as a sum of consecutive naturals, namely, 9325230 + 9325231.

It is an arithmetic number, because the mean of its divisors is an integer number (9325231).

Almost surely, 2^18650461 is an apocalyptic number.

It is an amenable number.

18650461 is a deficient number, since it is larger than the sum of its proper divisors (1).

18650461 is an equidigital number, since it uses as much as digits as its factorization.

18650461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 18650461 is about 4318.6179502244. The cubic root of 18650461 is about 265.1936924974.

The spelling of 18650461 in words is "eighteen million, six hundred fifty thousand, four hundred sixty-one".