20886291 has 6 divisors (see below), whose sum is σ = 30169100. Its totient is φ = 13924188.

The previous prime is 20886289. The next prime is 20886329. The reversal of 20886291 is 19268802.

20886291 is a `hidden beast` number, since 20 + 8 + 8 + 629 + 1 = 666.

It is not a de Polignac number, because 20886291 - 2¹ = 20886289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20886211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1160341 + ... + 1160358.

Almost surely, 2^20886291 is an apocalyptic number.

20886291 is a deficient number, since it is larger than the sum of its proper divisors (9282809).

20886291 is a wasteful number, since it uses less digits than its factorization.

20886291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320705 (or 2320702 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 20886291 is about 4570.1521856498. The cubic root of 20886291 is about 275.3935566167.

The spelling of 20886291 in words is "twenty million, eight hundred eighty-six thousand, two hundred ninety-one".