20266617 has 32 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 11194560.

The previous prime is 20266613. The next prime is 20266633. The reversal of 20266617 is 71666202.

It is not a de Polignac number, because 20266617 - 2² = 20266613 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20266613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145734 + ... + 145872.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 2^20266617 is an apocalyptic number.

It is an amenable number.

20266617 is a deficient number, since it is larger than the sum of its proper divisors (11666823).

20266617 is a wasteful number, since it uses less digits than its factorization.

20266617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 20266617 is about 4501.8459547168. The cubic root of 20266617 is about 272.6426243257.

The spelling of 20266617 in words is "twenty million, two hundred sixty-six thousand, six hundred seventeen".