20660512 has 12 divisors (see below), whose sum is σ = 40675446. Its totient is φ = 10330240.

The previous prime is 20660501. The next prime is 20660527. The reversal of 20660512 is 21506602.

It can be written as a sum of positive squares in only one way, i.e., 20394256 + 266256 = 4516^2 + 516^2 .

It is a super-2 number, since 2×20660512² = 853713512204288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322789 + ... + 322852.

Almost surely, 2^20660512 is an apocalyptic number.

It is an amenable number.

20660512 is a deficient number, since it is larger than the sum of its proper divisors (20014934).

20660512 is an equidigital number, since it uses as much as digits as its factorization.

20660512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645651 (or 645643 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20660512 is about 4545.3835921735. The cubic root of 20660512 is about 274.3976324853.

The spelling of 20660512 in words is "twenty million, six hundred sixty thousand, five hundred twelve".