20302056 has 64 divisors (see below), whose sum is σ = 56803200. Its totient is φ = 6718464.

The previous prime is 20302027. The next prime is 20302067. The reversal of 20302056 is 65020302.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 41445 + ... + 41931.

It is an arithmetic number, because the mean of its divisors is an integer number (887550).

Almost surely, 2^20302056 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 20302056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28401600).

20302056 is an abundant number, since it is smaller than the sum of its proper divisors (36501144).

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

20302056 is a wasteful number, since it uses less digits than its factorization.

20302056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20302056 is about 4505.7802875862. The cubic root of 20302056 is about 272.8014496416.

Adding to 20302056 its reverse (65020302), we get a palindrome (85322358).

The spelling of 20302056 in words is "twenty million, three hundred two thousand, fifty-six".