18486541 has 2 divisors, whose sum is σ = 18486542. Its totient is φ = 18486540.

The previous prime is 18486521. The next prime is 18486547. The reversal of 18486541 is 14568481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18361225 + 125316 = 4285^2 + 354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18486541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18486541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18486547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9243270 + 9243271.

It is an arithmetic number, because the mean of its divisors is an integer number (9243271).

Almost surely, 2^18486541 is an apocalyptic number.

It is an amenable number.

18486541 is a deficient number, since it is larger than the sum of its proper divisors (1).

18486541 is an equidigital number, since it uses as much as digits as its factorization.

18486541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 37.

The square root of 18486541 is about 4299.5977718852. The cubic root of 18486541 is about 264.4144708173.

The spelling of 18486541 in words is "eighteen million, four hundred eighty-six thousand, five hundred forty-one".