20798056 has 16 divisors (see below), whose sum is σ = 39060000. Its totient is φ = 10382064.

The previous prime is 20798051. The next prime is 20798077. The reversal of 20798056 is 65089702.

20798056 is nontrivially palindromic in base 15.

It is not an unprimeable number, because it can be changed into a prime (20798051) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4195 + ... + 7693.

It is an arithmetic number, because the mean of its divisors is an integer number (2441250).

Almost surely, 2^20798056 is an apocalyptic number.

It is an amenable number.

20798056 is a deficient number, since it is larger than the sum of its proper divisors (18261944).

20798056 is a wasteful number, since it uses less digits than its factorization.

20798056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248 (or 4244 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 20798056 is about 4560.4885703179. The cubic root of 20798056 is about 275.0052054111.

The spelling of 20798056 in words is "twenty million, seven hundred ninety-eight thousand, fifty-six".