18242057 has 2 divisors, whose sum is σ = 18242058. Its totient is φ = 18242056.

The previous prime is 18242053. The next prime is 18242083. The reversal of 18242057 is 75024281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10010896 + 8231161 = 3164^2 + 2869^2 .

It is a cyclic number.

It is not a de Polignac number, because 18242057 - 2² = 18242053 is a prime.

It is not a weakly prime, because it can be changed into another prime (18242053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9121028 + 9121029.

It is an arithmetic number, because the mean of its divisors is an integer number (9121029).

Almost surely, 2^18242057 is an apocalyptic number.

It is an amenable number.

18242057 is a deficient number, since it is larger than the sum of its proper divisors (1).

18242057 is an equidigital number, since it uses as much as digits as its factorization.

18242057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 18242057 is about 4271.0721136502. The cubic root of 18242057 is about 263.2436695570.

The spelling of 18242057 in words is "eighteen million, two hundred forty-two thousand, fifty-seven".