20525072 has 10 divisors (see below), whose sum is σ = 39767358. Its totient is φ = 10262528.

The previous prime is 20525053. The next prime is 20525077. The reversal of 20525072 is 27052502.

It can be written as a sum of positive squares in only one way, i.e., 12138256 + 8386816 = 3484^2 + 2896^2 .

It is not an unprimeable number, because it can be changed into a prime (20525077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641393 + ... + 641424.

Almost surely, 2^20525072 is an apocalyptic number.

It is an amenable number.

20525072 is a deficient number, since it is larger than the sum of its proper divisors (19242286).

20525072 is a wasteful number, since it uses less digits than its factorization.

20525072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282825 (or 1282819 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 20525072 is about 4530.4604622488. The cubic root of 20525072 is about 273.7967128363.

Adding to 20525072 its reverse (27052502), we get a palindrome (47577574).

It can be divided in two parts, 2052507 and 2, that multiplied together give a palindrome (4105014).

The spelling of 20525072 in words is "twenty million, five hundred twenty-five thousand, seventy-two".