18481097 has 2 divisors, whose sum is σ = 18481098. Its totient is φ = 18481096.

The previous prime is 18481069. The next prime is 18481157. The reversal of 18481097 is 79018481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13623481 + 4857616 = 3691^2 + 2204^2 .

It is a cyclic number.

It is not a de Polignac number, because 18481097 - 2¹⁰ = 18480073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18481097.

It is not a weakly prime, because it can be changed into another prime (18481007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9240548 + 9240549.

It is an arithmetic number, because the mean of its divisors is an integer number (9240549).

Almost surely, 2^18481097 is an apocalyptic number.

It is an amenable number.

18481097 is a deficient number, since it is larger than the sum of its proper divisors (1).

18481097 is an equidigital number, since it uses as much as digits as its factorization.

18481097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 18481097 is about 4298.9646427948. The cubic root of 18481097 is about 264.3885129469.

The spelling of 18481097 in words is "eighteen million, four hundred eighty-one thousand, ninety-seven".