20725272 has 24 divisors (see below), whose sum is σ = 56131140. Its totient is φ = 6908400.

The previous prime is 20725249. The next prime is 20725273. The reversal of 20725272 is 27252702.

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 (20725273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143854 + ... + 143997.

Almost surely, 2^20725272 is an apocalyptic number.

It is an amenable number.

20725272 is an abundant number, since it is smaller than the sum of its proper divisors (35405868).

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

20725272 is a wasteful number, since it uses less digits than its factorization.

20725272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287863 (or 287856 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 20725272 is about 4552.5017298185. The cubic root of 20725272 is about 274.6840315893.

Adding to 20725272 its reverse (27252702), we get a palindrome (47977974).

The spelling of 20725272 in words is "twenty million, seven hundred twenty-five thousand, two hundred seventy-two".