20725072 has 10 divisors (see below), whose sum is σ = 40154858. Its totient is φ = 10362528.

The previous prime is 20725051. The next prime is 20725123. The reversal of 20725072 is 27052702.

It can be written as a sum of positive squares in only one way, i.e., 12222016 + 8503056 = 3496^2 + 2916^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647643 + ... + 647674.

Almost surely, 2^20725072 is an apocalyptic number.

It is an amenable number.

20725072 is a deficient number, since it is larger than the sum of its proper divisors (19429786).

20725072 is a wasteful number, since it uses less digits than its factorization.

20725072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295325 (or 1295319 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 20725072 is about 4552.4797638210. The cubic root of 20725072 is about 274.6831480145.

Adding to 20725072 its reverse (27052702), we get a palindrome (47777774).

The spelling of 20725072 in words is "twenty million, seven hundred twenty-five thousand, seventy-two".