20886081 has 16 divisors (see below), whose sum is σ = 30046464. Its totient is φ = 12856064.

The previous prime is 20886049. The next prime is 20886083. The reversal of 20886081 is 18068802.

It is a cyclic number.

It is not a de Polignac number, because 20886081 - 2⁵ = 20886049 is a prime.

It is a super-3 number, since 3×20886081³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (20886083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1161 + ... + 6566.

It is an arithmetic number, because the mean of its divisors is an integer number (1877904).

Almost surely, 2^20886081 is an apocalyptic number.

It is an amenable number.

20886081 is a deficient number, since it is larger than the sum of its proper divisors (9160383).

20886081 is a wasteful number, since it uses less digits than its factorization.

20886081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7800.

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 20886081 is about 4570.1292104272. The cubic root of 20886081 is about 275.3926336375.

The spelling of 20886081 in words is "twenty million, eight hundred eighty-six thousand, eighty-one".