18212057 has 2 divisors, whose sum is σ = 18212058. Its totient is φ = 18212056.

The previous prime is 18212027. The next prime is 18212069. The reversal of 18212057 is 75021281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11806096 + 6405961 = 3436^2 + 2531^2 .

It is a cyclic number.

It is not a de Polignac number, because 18212057 - 2⁶ = 18211993 is a prime.

It is not a weakly prime, because it can be changed into another prime (18212027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9106028 + 9106029.

It is an arithmetic number, because the mean of its divisors is an integer number (9106029).

Almost surely, 2^18212057 is an apocalyptic number.

It is an amenable number.

18212057 is a deficient number, since it is larger than the sum of its proper divisors (1).

18212057 is an equidigital number, since it uses as much as digits as its factorization.

18212057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 18212057 is about 4267.5586697783. The cubic root of 18212057 is about 263.0992844652.

The spelling of 18212057 in words is "eighteen million, two hundred twelve thousand, fifty-seven".