20320528 has 10 divisors (see below), whose sum is σ = 39371054. Its totient is φ = 10160256.

The previous prime is 20320507. The next prime is 20320537. The reversal of 20320528 is 82502302.

It can be written as a sum of positive squares in only one way, i.e., 19784704 + 535824 = 4448^2 + 732^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20320499 and 20320508.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635001 + ... + 635032.

Almost surely, 2^20320528 is an apocalyptic number.

It is an amenable number.

20320528 is a deficient number, since it is larger than the sum of its proper divisors (19050526).

20320528 is a wasteful number, since it uses less digits than its factorization.

20320528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270041 (or 1270035 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 20320528 is about 4507.8296329830. The cubic root of 20320528 is about 272.8841614752.

The spelling of 20320528 in words is "twenty million, three hundred twenty thousand, five hundred twenty-eight".