20537272 has 24 divisors (see below), whose sum is σ = 44795160. Its totient is φ = 8801520.

The previous prime is 20537267. The next prime is 20537311. The reversal of 20537272 is 27273502.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 20537272.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25804 + ... + 26587.

It is an arithmetic number, because the mean of its divisors is an integer number (1866465).

Almost surely, 2^20537272 is an apocalyptic number.

It is an amenable number.

20537272 is an abundant number, since it is smaller than the sum of its proper divisors (24257888).

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

20537272 is a wasteful number, since it uses less digits than its factorization.

20537272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52411 (or 52400 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 20537272 is about 4531.8067037331. The cubic root of 20537272 is about 273.8509498899.

The spelling of 20537272 in words is "twenty million, five hundred thirty-seven thousand, two hundred seventy-two".