20726136 has 24 divisors (see below), whose sum is σ = 56133480. Its totient is φ = 6908688.

The previous prime is 20726119. The next prime is 20726137. The reversal of 20726136 is 63162702.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20726137) 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 5 ways as a sum of consecutive naturals, for example, 143860 + ... + 144003.

It is an arithmetic number, because the mean of its divisors is an integer number (2338895).

Almost surely, 2^20726136 is an apocalyptic number.

It is an amenable number.

20726136 is an abundant number, since it is smaller than the sum of its proper divisors (35407344).

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

20726136 is a wasteful number, since it uses less digits than its factorization.

20726136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287875 (or 287868 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20726136 is about 4552.5966217094. The cubic root of 20726136 is about 274.6878485670.

Adding to 20726136 its reverse (63162702), we get a palindrome (83888838).

The spelling of 20726136 in words is "twenty million, seven hundred twenty-six thousand, one hundred thirty-six".