18965969 has 8 divisors (see below), whose sum is σ = 20756640. Its totient is φ = 17186400.

The previous prime is 18965959. The next prime is 18965981. The reversal of 18965969 is 96956981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18965969 - 2⁴ = 18965953 is a prime.

It is a super-2 number, since 2×18965969² = 719415960217922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 18965969.

It is not an unprimeable number, because it can be changed into a prime (18965909) 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 7 ways as a sum of consecutive naturals, for example, 1037 + ... + 6245.

It is an arithmetic number, because the mean of its divisors is an integer number (2594580).

Almost surely, 2^18965969 is an apocalyptic number.

It is an amenable number.

18965969 is a deficient number, since it is larger than the sum of its proper divisors (1790671).

18965969 is a wasteful number, since it uses less digits than its factorization.

18965969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5551.

The product of its digits is 1049760, while the sum is 53.

The square root of 18965969 is about 4354.9935706038. The cubic root of 18965969 is about 266.6807567208.

The spelling of 18965969 in words is "eighteen million, nine hundred sixty-five thousand, nine hundred sixty-nine".