20660546 has 4 divisors (see below), whose sum is σ = 30990822. Its totient is φ = 10330272.

The previous prime is 20660527. The next prime is 20660567. The reversal of 20660546 is 64506602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18395521 + 2265025 = 4289^2 + 1505^2 .

It is a super-2 number, since 2×20660546² = 853716322036232, 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, 5165135 + ... + 5165138.

Almost surely, 2^20660546 is an apocalyptic number.

20660546 is a deficient number, since it is larger than the sum of its proper divisors (10330276).

20660546 is a wasteful number, since it uses less digits than its factorization.

20660546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10330275.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 20660546 is about 4545.3873322303. The cubic root of 20660546 is about 274.3977830062.

The spelling of 20660546 in words is "twenty million, six hundred sixty thousand, five hundred forty-six".