20734272 has 168 divisors, whose sum is σ = 66934080. Its totient is φ = 6289920.

The previous prime is 20734267. The next prime is 20734277. The reversal of 20734272 is 27243702.

It is an interprime number because it is at equal distance from previous prime (20734267) and next prime (20734277).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20734277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291997 + ... + 292067.

Almost surely, 2^20734272 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 20734272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33467040).

20734272 is an abundant number, since it is smaller than the sum of its proper divisors (46199808).

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

20734272 is a wasteful number, since it uses less digits than its factorization.

20734272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 20734272 is about 4553.4900900298. The cubic root of 20734272 is about 274.7237865725.

Adding to 20734272 its reverse (27243702), we get a palindrome (47977974).

The spelling of 20734272 in words is "twenty million, seven hundred thirty-four thousand, two hundred seventy-two".