20071528 has 16 divisors (see below), whose sum is σ = 38008260. Its totient is φ = 9936000.

The previous prime is 20071517. The next prime is 20071529. The reversal of 20071528 is 82517002.

It can be written as a sum of positive squares in 2 ways, for example, as 20052484 + 19044 = 4478^2 + 138^2 .

It is not an unprimeable number, because it can be changed into a prime (20071529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11613 + ... + 13228.

Almost surely, 2^20071528 is an apocalyptic number.

It is an amenable number.

20071528 is a deficient number, since it is larger than the sum of its proper divisors (17936732).

20071528 is a wasteful number, since it uses less digits than its factorization.

20071528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24948 (or 24944 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 20071528 is about 4480.1258910883. The cubic root of 20071528 is about 271.7649714282.

The spelling of 20071528 in words is "twenty million, seventy-one thousand, five hundred twenty-eight".