20836778 has 8 divisors (see below), whose sum is σ = 31307520. Its totient is φ = 10400940.

The previous prime is 20836721. The next prime is 20836793. The reversal of 20836778 is 87763802.

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

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, 7178 + ... + 9653.

It is an arithmetic number, because the mean of its divisors is an integer number (3913440).

Almost surely, 2^20836778 is an apocalyptic number.

20836778 is a deficient number, since it is larger than the sum of its proper divisors (10470742).

20836778 is a wasteful number, since it uses less digits than its factorization.

20836778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17452.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 20836778 is about 4564.7319746071. The cubic root of 20836778 is about 275.1757686238.

The spelling of 20836778 in words is "twenty million, eight hundred thirty-six thousand, seven hundred seventy-eight".