20936136 has 32 divisors (see below), whose sum is σ = 56367360. Its totient is φ = 6441792.

The previous prime is 20936131. The next prime is 20936137. The reversal of 20936136 is 63163902.

It is a happy number.

It is a super-2 number, since 2×20936136² = 876643581220992, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20936131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33240 + ... + 33863.

It is an arithmetic number, because the mean of its divisors is an integer number (1761480).

Almost surely, 2^20936136 is an apocalyptic number.

20936136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20936136 is an abundant number, since it is smaller than the sum of its proper divisors (35431224).

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

20936136 is a wasteful number, since it uses less digits than its factorization.

20936136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67125 (or 67121 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 20936136 is about 4575.6022554414. The cubic root of 20936136 is about 275.6124575614.

The spelling of 20936136 in words is "twenty million, nine hundred thirty-six thousand, one hundred thirty-six".