20136672 has 72 divisors (see below), whose sum is σ = 59262840. Its totient is φ = 6478080.

The previous prime is 20136659. The next prime is 20136679. The reversal of 20136672 is 27663102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20136679) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7147 + ... + 9557.

It is an arithmetic number, because the mean of its divisors is an integer number (823095).

Almost surely, 2^20136672 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 20136672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29631420).

20136672 is an abundant number, since it is smaller than the sum of its proper divisors (39126168).

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

20136672 is a wasteful number, since it uses less digits than its factorization.

20136672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456 (or 2445 counting only the distinct ones).

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

The square root of 20136672 is about 4487.3903329218. The cubic root of 20136672 is about 272.0586666996.

Adding to 20136672 its reverse (27663102), we get a palindrome (47799774).

The spelling of 20136672 in words is "twenty million, one hundred thirty-six thousand, six hundred seventy-two".