20320672 has 12 divisors (see below), whose sum is σ = 40006386. Its totient is φ = 10160320.

The previous prime is 20320669. The next prime is 20320687. The reversal of 20320672 is 27602302.

It can be written as a sum of positive squares in only one way, i.e., 19749136 + 571536 = 4444^2 + 756^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317479 + ... + 317542.

Almost surely, 2^20320672 is an apocalyptic number.

It is an amenable number.

20320672 is a deficient number, since it is larger than the sum of its proper divisors (19685714).

20320672 is an equidigital number, since it uses as much as digits as its factorization.

20320672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635031 (or 635023 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20320672 is about 4507.8456051644. The cubic root of 20320672 is about 272.8848060652.

Adding to 20320672 its reverse (27602302), we get a palindrome (47922974).

The spelling of 20320672 in words is "twenty million, three hundred twenty thousand, six hundred seventy-two".