18210969 has 12 divisors (see below), whose sum is σ = 30062656. Its totient is φ = 10406232.

The previous prime is 18210943. The next prime is 18210971. The reversal of 18210969 is 96901281.

It is not a de Polignac number, because 18210969 - 2⁵ = 18210937 is a prime.

It is a super-2 number, since 2×18210969² = 663278783837922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18210989) 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 11 ways as a sum of consecutive naturals, for example, 144469 + ... + 144594.

Almost surely, 2^18210969 is an apocalyptic number.

It is an amenable number.

18210969 is a deficient number, since it is larger than the sum of its proper divisors (11851687).

18210969 is a wasteful number, since it uses less digits than its factorization.

18210969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289076 (or 289073 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 18210969 is about 4267.4311945244. The cubic root of 18210969 is about 263.0940451207.

The spelling of 18210969 in words is "eighteen million, two hundred ten thousand, nine hundred sixty-nine".