20799906 has 8 divisors (see below), whose sum is σ = 41599824. Its totient is φ = 6933300.

The previous prime is 20799893. The next prime is 20799913. The reversal of 20799906 is 60999702.

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

20799906 is an admirable number.

It is a Curzon 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, 1733320 + ... + 1733331.

It is an arithmetic number, because the mean of its divisors is an integer number (5199978).

Almost surely, 2^20799906 is an apocalyptic number.

20799906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20799906 is a wasteful number, since it uses less digits than its factorization.

20799906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466656.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 20799906 is about 4560.6913949532. The cubic root of 20799906 is about 275.0133591306.

The spelling of 20799906 in words is "twenty million, seven hundred ninety-nine thousand, nine hundred six".