18352057 has 2 divisors, whose sum is σ = 18352058. Its totient is φ = 18352056.

The previous prime is 18352049. The next prime is 18352063. The reversal of 18352057 is 75025381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14907321 + 3444736 = 3861^2 + 1856^2 .

It is a cyclic number.

It is not a de Polignac number, because 18352057 - 2³ = 18352049 is a prime.

It is a super-2 number, since 2×18352057² = 673595992262498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18352457) 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, 9176028 + 9176029.

It is an arithmetic number, because the mean of its divisors is an integer number (9176029).

Almost surely, 2^18352057 is an apocalyptic number.

It is an amenable number.

18352057 is a deficient number, since it is larger than the sum of its proper divisors (1).

18352057 is an equidigital number, since it uses as much as digits as its factorization.

18352057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 18352057 is about 4283.9300881317. The cubic root of 18352057 is about 263.7717312493.

The spelling of 18352057 in words is "eighteen million, three hundred fifty-two thousand, fifty-seven".