20886943 has 16 divisors (see below), whose sum is σ = 26141184. Its totient is φ = 16212960.

The previous prime is 20886919. The next prime is 20886953. The reversal of 20886943 is 34968802.

It is a cyclic number.

It is not a de Polignac number, because 20886943 - 2⁵ = 20886911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20886896 and 20886905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20886953) 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 15 ways as a sum of consecutive naturals, for example, 37221 + ... + 37777.

It is an arithmetic number, because the mean of its divisors is an integer number (1633824).

Almost surely, 2^20886943 is an apocalyptic number.

20886943 is a deficient number, since it is larger than the sum of its proper divisors (5254241).

20886943 is a wasteful number, since it uses less digits than its factorization.

20886943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 20886943 is about 4570.2235175098. The cubic root of 20886943 is about 275.3964222082.

The spelling of 20886943 in words is "twenty million, eight hundred eighty-six thousand, nine hundred forty-three".