18053533 has 2 divisors, whose sum is σ = 18053534. Its totient is φ = 18053532.

The previous prime is 18053513. The next prime is 18053599. The reversal of 18053533 is 33535081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15824484 + 2229049 = 3978^2 + 1493^2 .

It is a cyclic number.

It is not a de Polignac number, because 18053533 - 2¹³ = 18045341 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18053513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9026766 + 9026767.

It is an arithmetic number, because the mean of its divisors is an integer number (9026767).

Almost surely, 2^18053533 is an apocalyptic number.

It is an amenable number.

18053533 is a deficient number, since it is larger than the sum of its proper divisors (1).

18053533 is an equidigital number, since it uses as much as digits as its factorization.

18053533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 18053533 is about 4248.9449278615. The cubic root of 18053533 is about 262.3336899682. Note that the first 3 decimals are identical.

The spelling of 18053533 in words is "eighteen million, fifty-three thousand, five hundred thirty-three".