18261041 has 2 divisors, whose sum is σ = 18261042. Its totient is φ = 18261040.

The previous prime is 18261037. The next prime is 18261049. The reversal of 18261041 is 14016281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18241441 + 19600 = 4271^2 + 140^2 .

It is a cyclic number.

It is not a de Polignac number, because 18261041 - 2² = 18261037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18260998 and 18261016.

It is not a weakly prime, because it can be changed into another prime (18261049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9130520 + 9130521.

It is an arithmetic number, because the mean of its divisors is an integer number (9130521).

Almost surely, 2^18261041 is an apocalyptic number.

It is an amenable number.

18261041 is a deficient number, since it is larger than the sum of its proper divisors (1).

18261041 is an equidigital number, since it uses as much as digits as its factorization.

18261041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 18261041 is about 4273.2939285755. The cubic root of 18261041 is about 263.3349546803.

The spelling of 18261041 in words is "eighteen million, two hundred sixty-one thousand, forty-one".