20845296 has 80 divisors (see below), whose sum is σ = 60745120. Its totient is φ = 6842880.

The previous prime is 20845277. The next prime is 20845327. The reversal of 20845296 is 69254802.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20845296.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31206 + ... + 31866.

It is an arithmetic number, because the mean of its divisors is an integer number (759314).

Almost surely, 2^20845296 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 20845296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30372560).

20845296 is an abundant number, since it is smaller than the sum of its proper divisors (39899824).

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

20845296 is a wasteful number, since it uses less digits than its factorization.

20845296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 20845296 is about 4565.6649022897. The cubic root of 20845296 is about 275.2132604706.

The spelling of 20845296 in words is "twenty million, eight hundred forty-five thousand, two hundred ninety-six".