18160553 has 2 divisors, whose sum is σ = 18160554. Its totient is φ = 18160552.

The previous prime is 18160537. The next prime is 18160579. The reversal of 18160553 is 35506181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11042329 + 7118224 = 3323^2 + 2668^2 .

It is a cyclic number.

It is not a de Polignac number, because 18160553 - 2⁴ = 18160537 is a prime.

It is not a weakly prime, because it can be changed into another prime (18162553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9080276 + 9080277.

It is an arithmetic number, because the mean of its divisors is an integer number (9080277).

Almost surely, 2^18160553 is an apocalyptic number.

It is an amenable number.

18160553 is a deficient number, since it is larger than the sum of its proper divisors (1).

18160553 is an equidigital number, since it uses as much as digits as its factorization.

18160553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 18160553 is about 4261.5200339785. The cubic root of 18160553 is about 262.8510339154.

The spelling of 18160553 in words is "eighteen million, one hundred sixty thousand, five hundred fifty-three".