20736136 has 16 divisors (see below), whose sum is σ = 38952540. Its totient is φ = 10348800.

The previous prime is 20736109. The next prime is 20736137. The reversal of 20736136 is 63163702.

It can be written as a sum of positive squares in 2 ways, for example, as 14516100 + 6220036 = 3810^2 + 2494^2 .

It is not an unprimeable number, because it can be changed into a prime (20736137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2836 + ... + 7036.

Almost surely, 2^20736136 is an apocalyptic number.

It is an amenable number.

20736136 is a deficient number, since it is larger than the sum of its proper divisors (18216404).

20736136 is a wasteful number, since it uses less digits than its factorization.

20736136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4824 (or 4820 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 20736136 is about 4553.6947635958. The cubic root of 20736136 is about 274.7320188332.

Adding to 20736136 its reverse (63163702), we get a palindrome (83899838).

The spelling of 20736136 in words is "twenty million, seven hundred thirty-six thousand, one hundred thirty-six".