20113436 has 12 divisors (see below), whose sum is σ = 40226928. Its totient is φ = 8620032.

The previous prime is 20113433. The next prime is 20113453. The reversal of 20113436 is 63431102.

20113436 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113433) 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 3 ways as a sum of consecutive naturals, for example, 359141 + ... + 359196.

It is an arithmetic number, because the mean of its divisors is an integer number (3352244).

Almost surely, 2^20113436 is an apocalyptic number.

It is an amenable number.

20113436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20113436 is a wasteful number, since it uses less digits than its factorization.

20113436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718348 (or 718346 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 20113436 is about 4484.8005529789. The cubic root of 20113436 is about 271.9539822669.

Adding to 20113436 its reverse (63431102), we get a palindrome (83544538).

The spelling of 20113436 in words is "twenty million, one hundred thirteen thousand, four hundred thirty-six".