18890069 has 8 divisors (see below), whose sum is σ = 20766240. Its totient is φ = 17040400.

The previous prime is 18890063. The next prime is 18890087. The reversal of 18890069 is 96009881.

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

It is a cyclic number.

It is not a de Polignac number, because 18890069 - 2²⁰ = 17841493 is a prime.

It is a super-2 number, since 2×18890069² = 713669413649522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18890063) 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, 5114 + ... + 7995.

It is an arithmetic number, because the mean of its divisors is an integer number (2595780).

Almost surely, 2^18890069 is an apocalyptic number.

It is an amenable number.

18890069 is a deficient number, since it is larger than the sum of its proper divisors (1876171).

18890069 is a wasteful number, since it uses less digits than its factorization.

18890069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13251.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 18890069 is about 4346.2707002671. The cubic root of 18890069 is about 266.3245374565.

The spelling of 18890069 in words is "eighteen million, eight hundred ninety thousand, sixty-nine".