20806926 has 64 divisors (see below), whose sum is σ = 50029056. Its totient is φ = 5644800.

The previous prime is 20806897. The next prime is 20806937. The reversal of 20806926 is 62960802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73906 + ... + 74186.

It is an arithmetic number, because the mean of its divisors is an integer number (781704).

Almost surely, 2^20806926 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20806926, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25014528).

20806926 is an abundant number, since it is smaller than the sum of its proper divisors (29222130).

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

20806926 is a wasteful number, since it uses less digits than its factorization.

20806926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20806926 is about 4561.4609501781. The cubic root of 20806926 is about 275.0442947933.

The spelling of 20806926 in words is "twenty million, eight hundred six thousand, nine hundred twenty-six".