20846808 has 80 divisors (see below), whose sum is σ = 59590080. Its totient is φ = 6806592.

The previous prime is 20846801. The next prime is 20846827. The reversal of 20846808 is 80864802.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20846801) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34041 + ... + 34647.

It is an arithmetic number, because the mean of its divisors is an integer number (744876).

Almost surely, 2^20846808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20846808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29795040).

20846808 is an abundant number, since it is smaller than the sum of its proper divisors (38743272).

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

20846808 is a wasteful number, since it uses less digits than its factorization.

20846808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 20846808 is about 4565.8304830556. The cubic root of 20846808 is about 275.2199144481.

The spelling of 20846808 in words is "twenty million, eight hundred forty-six thousand, eight hundred eight".