20782536 has 32 divisors (see below), whose sum is σ = 52587360. Its totient is φ = 6843392.

The previous prime is 20782513. The next prime is 20782543. The reversal of 20782536 is 63528702.

It is a junction number, because it is equal to n+sod(n) for n = 20782497 and 20782506.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3225 + ... + 7208.

It is an arithmetic number, because the mean of its divisors is an integer number (1643355).

Almost surely, 2^20782536 is an apocalyptic number.

It is an amenable number.

20782536 is an abundant number, since it is smaller than the sum of its proper divisors (31804824).

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

20782536 is a wasteful number, since it uses less digits than its factorization.

20782536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10525 (or 10521 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20782536 is about 4558.7866806860. The cubic root of 20782536 is about 274.9367832651.

The spelling of 20782536 in words is "twenty million, seven hundred eighty-two thousand, five hundred thirty-six".