20785896 has 40 divisors (see below), whose sum is σ = 58221570. Its totient is φ = 6928416.

The previous prime is 20785873. The next prime is 20785913. The reversal of 20785896 is 69858702.

It can be written as a sum of positive squares in only one way, i.e., 11088900 + 9696996 = 3330^2 + 3114^2 .

It is a super-3 number, since 3×20785896³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15391 + ... + 16686.

Almost surely, 2^20785896 is an apocalyptic number.

It is an amenable number.

20785896 is an abundant number, since it is smaller than the sum of its proper divisors (37435674).

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

20785896 is a wasteful number, since it uses less digits than its factorization.

20785896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32095 (or 32082 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 20785896 is about 4559.1551848999. The cubic root of 20785896 is about 274.9515991953.

The spelling of 20785896 in words is "twenty million, seven hundred eighty-five thousand, eight hundred ninety-six".