18306053 has 2 divisors, whose sum is σ = 18306054. Its totient is φ = 18306052.

The previous prime is 18306037. The next prime is 18306121. The reversal of 18306053 is 35060381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18258529 + 47524 = 4273^2 + 218^2 .

It is an emirp because it is prime and its reverse (35060381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18306053 - 2⁴ = 18306037 is a prime.

It is a super-2 number, since 2×18306053² = 670223152877618, which contains 22 as substring.

It is a Chen prime.

It is equal to p_1169630 and since 18306053 and 1169630 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18303053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9153026 + 9153027.

It is an arithmetic number, because the mean of its divisors is an integer number (9153027).

Almost surely, 2^18306053 is an apocalyptic number.

It is an amenable number.

18306053 is a deficient number, since it is larger than the sum of its proper divisors (1).

18306053 is an equidigital number, since it uses as much as digits as its factorization.

18306053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 18306053 is about 4278.5573503227. The cubic root of 18306053 is about 263.5511436553.

The spelling of 18306053 in words is "eighteen million, three hundred six thousand, fifty-three".