20868466 has 8 divisors (see below), whose sum is σ = 31816044. Its totient is φ = 10263120.

The previous prime is 20868461. The next prime is 20868473. The reversal of 20868466 is 66486802.

It can be written as a sum of positive squares in 2 ways, for example, as 20839225 + 29241 = 4565^2 + 171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20868461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85405 + ... + 85648.

Almost surely, 2^20868466 is an apocalyptic number.

20868466 is a deficient number, since it is larger than the sum of its proper divisors (10947578).

20868466 is a wasteful number, since it uses less digits than its factorization.

20868466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171116.

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 20868466 is about 4568.2016155157. The cubic root of 20868466 is about 275.3151912227.

The spelling of 20868466 in words is "twenty million, eight hundred sixty-eight thousand, four hundred sixty-six".