18494057 has 2 divisors, whose sum is σ = 18494058. Its totient is φ = 18494056.

The previous prime is 18494053. The next prime is 18494123. The reversal of 18494057 is 75049481.

18494057 is nontrivially palindromic in base 11.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14409616 + 4084441 = 3796^2 + 2021^2 .

It is a cyclic number.

It is not a de Polignac number, because 18494057 - 2² = 18494053 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18494057.

It is not a weakly prime, because it can be changed into another prime (18494051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9247028 + 9247029.

It is an arithmetic number, because the mean of its divisors is an integer number (9247029).

Almost surely, 2^18494057 is an apocalyptic number.

It is an amenable number.

18494057 is a deficient number, since it is larger than the sum of its proper divisors (1).

18494057 is an equidigital number, since it uses as much as digits as its factorization.

18494057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 18494057 is about 4300.4717183118. The cubic root of 18494057 is about 264.4502999446.

The spelling of 18494057 in words is "eighteen million, four hundred ninety-four thousand, fifty-seven".