20868946 has 8 divisors (see below), whose sum is σ = 35775360. Its totient is φ = 8943828.

The previous prime is 20868943. The next prime is 20868961. The reversal of 20868946 is 64986802.

It is a happy number.

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 (20868941) 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, 745306 + ... + 745333.

It is an arithmetic number, because the mean of its divisors is an integer number (4471920).

Almost surely, 2^20868946 is an apocalyptic number.

20868946 is a deficient number, since it is larger than the sum of its proper divisors (14906414).

20868946 is a wasteful number, since it uses less digits than its factorization.

20868946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1490648.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 20868946 is about 4568.2541522993. The cubic root of 20868946 is about 275.3173020675.

The spelling of 20868946 in words is "twenty million, eight hundred sixty-eight thousand, nine hundred forty-six".