20866982 has 8 divisors (see below), whose sum is σ = 31384200. Its totient is φ = 10405584.

The previous prime is 20866969. The next prime is 20867023. The reversal of 20866982 is 28966802.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13007 + ... + 14522.

It is an arithmetic number, because the mean of its divisors is an integer number (3923025).

Almost surely, 2^20866982 is an apocalyptic number.

20866982 is a deficient number, since it is larger than the sum of its proper divisors (10517218).

20866982 is a wasteful number, since it uses less digits than its factorization.

20866982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27910.

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 20866982 is about 4568.0391854712. The cubic root of 20866982 is about 275.3086649894.

The spelling of 20866982 in words is "twenty million, eight hundred sixty-six thousand, nine hundred eighty-two".