20502272 has 72 divisors (see below), whose sum is σ = 49595616. Its totient is φ = 8257536.

The previous prime is 20502263. The next prime is 20502281. The reversal of 20502272 is 27220502.

It is an interprime number because it is at equal distance from previous prime (20502263) and next prime (20502281).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30128 + ... + 30800.

It is an arithmetic number, because the mean of its divisors is an integer number (688828).

Almost surely, 2^20502272 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 20502272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24797808).

20502272 is an abundant number, since it is smaller than the sum of its proper divisors (29093344).

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

20502272 is an equidigital number, since it uses as much as digits as its factorization.

20502272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 699 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 20502272 is about 4527.9434625446. The cubic root of 20502272 is about 273.6952941426.

Adding to 20502272 its reverse (27220502), we get a palindrome (47722774).

The spelling of 20502272 in words is "twenty million, five hundred two thousand, two hundred seventy-two".