18546461 has 2 divisors, whose sum is σ = 18546462. Its totient is φ = 18546460.

The previous prime is 18546419. The next prime is 18546467. The reversal of 18546461 is 16464581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15760900 + 2785561 = 3970^2 + 1669^2 .

It is a cyclic number.

It is not a de Polignac number, because 18546461 - 2⁶ = 18546397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18546467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9273230 + 9273231.

It is an arithmetic number, because the mean of its divisors is an integer number (9273231).

Almost surely, 2^18546461 is an apocalyptic number.

It is an amenable number.

18546461 is a deficient number, since it is larger than the sum of its proper divisors (1).

18546461 is an equidigital number, since it uses as much as digits as its factorization.

18546461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 35.

The square root of 18546461 is about 4306.5602283029. The cubic root of 18546461 is about 264.6998428959.

The spelling of 18546461 in words is "eighteen million, five hundred forty-six thousand, four hundred sixty-one".