20802288 has 160 divisors (see below), whose sum is σ = 64120896. Its totient is φ = 5750784.

The previous prime is 20802277. The next prime is 20802307. The reversal of 20802288 is 88220802.

20802288 is a modest number, since divided by 2288 gives 2080 as remainder.

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, 392470 + ... + 392522.

Almost surely, 2^20802288 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 20802288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32060448).

20802288 is an abundant number, since it is smaller than the sum of its proper divisors (43318608).

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

20802288 is a wasteful number, since it uses less digits than its factorization.

20802288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 20802288 is about 4560.9525320924. The cubic root of 20802288 is about 275.0238568835.

The spelling of 20802288 in words is "twenty million, eight hundred two thousand, two hundred eighty-eight".