20869081 has 8 divisors (see below), whose sum is σ = 22567680. Its totient is φ = 19222848.

The previous prime is 20869003. The next prime is 20869091. The reversal of 20869081 is 18096802.

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 20869081 - 2¹⁵ = 20836313 is a prime.

It is a super-2 number, since 2×20869081² = 871037083569122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20869001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12261 + ... + 13858.

It is an arithmetic number, because the mean of its divisors is an integer number (2820960).

Almost surely, 2^20869081 is an apocalyptic number.

It is an amenable number.

20869081 is a deficient number, since it is larger than the sum of its proper divisors (1698599).

20869081 is a wasteful number, since it uses less digits than its factorization.

20869081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26183.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 20869081 is about 4568.2689281609. The cubic root of 20869081 is about 275.3178957367.

The spelling of 20869081 in words is "twenty million, eight hundred sixty-nine thousand, eighty-one".