20799886 has 8 divisors (see below), whose sum is σ = 31219344. Its totient is φ = 10393440.

The previous prime is 20799871. The next prime is 20799893. The reversal of 20799886 is 68899702.

It is a happy number.

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

It is a super-2 number, since 2×20799886² = 865270515225992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3831 + ... + 7501.

It is an arithmetic number, because the mean of its divisors is an integer number (3902418).

Almost surely, 2^20799886 is an apocalyptic number.

20799886 is a deficient number, since it is larger than the sum of its proper divisors (10419458).

20799886 is a wasteful number, since it uses less digits than its factorization.

20799886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6506.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 20799886 is about 4560.6892023027. The cubic root of 20799886 is about 275.0132709849.

The spelling of 20799886 in words is "twenty million, seven hundred ninety-nine thousand, eight hundred eighty-six".