18065969 has 4 divisors (see below), whose sum is σ = 18196080. Its totient is φ = 17935860.

The previous prime is 18065921. The next prime is 18065981. The reversal of 18065969 is 96956081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96956081 = 229 ⋅423389.

It is a cyclic number.

It is not a de Polignac number, because 18065969 - 2¹² = 18061873 is a prime.

It is a super-2 number, since 2×18065969² = 652758471817922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18065909) 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 in 3 ways as a sum of consecutive naturals, for example, 64847 + ... + 65124.

It is an arithmetic number, because the mean of its divisors is an integer number (4549020).

Almost surely, 2^18065969 is an apocalyptic number.

It is an amenable number.

18065969 is a deficient number, since it is larger than the sum of its proper divisors (130111).

18065969 is a wasteful number, since it uses less digits than its factorization.

18065969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130110.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 18065969 is about 4250.4080980536. The cubic root of 18065969 is about 262.3939114766.

The spelling of 18065969 in words is "eighteen million, sixty-five thousand, nine hundred sixty-nine".