18064481 has 2 divisors, whose sum is σ = 18064482. Its totient is φ = 18064480.

The previous prime is 18064471. The next prime is 18064511. The reversal of 18064481 is 18446081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17986081 + 78400 = 4241^2 + 280^2 .

It is an emirp because it is prime and its reverse (18446081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18064481 - 2¹⁰ = 18063457 is a prime.

It is a super-2 number, since 2×18064481² = 652650947598722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18064441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9032240 + 9032241.

It is an arithmetic number, because the mean of its divisors is an integer number (9032241).

Almost surely, 2^18064481 is an apocalyptic number.

It is an amenable number.

18064481 is a deficient number, since it is larger than the sum of its proper divisors (1).

18064481 is an equidigital number, since it uses as much as digits as its factorization.

18064481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 18064481 is about 4250.2330524337. The cubic root of 18064481 is about 262.3867072711.

The spelling of 18064481 in words is "eighteen million, sixty-four thousand, four hundred eighty-one".