20562736 has 40 divisors (see below), whose sum is σ = 42211584. Its totient is φ = 9683520.

The previous prime is 20562733. The next prime is 20562743. The reversal of 20562736 is 63726502.

It is a super-2 number, since 2×20562736² = 845652223611392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20562698 and 20562707.

It is not an unprimeable number, because it can be changed into a prime (20562733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25735 + ... + 26521.

Almost surely, 2^20562736 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 20562736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21105792).

20562736 is an abundant number, since it is smaller than the sum of its proper divisors (21648848).

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

20562736 is a wasteful number, since it uses less digits than its factorization.

20562736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 20562736 is about 4534.6153089319. The cubic root of 20562736 is about 273.9640850150.

The spelling of 20562736 in words is "twenty million, five hundred sixty-two thousand, seven hundred thirty-six".