18610969 has 4 divisors (see below), whose sum is σ = 20042596. Its totient is φ = 17179344.

The previous prime is 18610957. The next prime is 18610993. The reversal of 18610969 is 96901681.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7354944 + 11256025 = 2712^2 + 3355^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18610969 is a prime.

It is a super-2 number, since 2×18610969² = 692736334237922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18610909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715794 + ... + 715819.

It is an arithmetic number, because the mean of its divisors is an integer number (5010649).

Almost surely, 2^18610969 is an apocalyptic number.

It is an amenable number.

18610969 is a deficient number, since it is larger than the sum of its proper divisors (1431627).

18610969 is a wasteful number, since it uses less digits than its factorization.

18610969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431626.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 18610969 is about 4314.0432311232. The cubic root of 18610969 is about 265.0063793409.

The spelling of 18610969 in words is "eighteen million, six hundred ten thousand, nine hundred sixty-nine".