20630277 has 6 divisors (see below), whose sum is σ = 29799302. Its totient is φ = 13753512.

The previous prime is 20630249. The next prime is 20630293. The reversal of 20630277 is 77203602.

20630277 is a `hidden beast` number, since 2 + 0 + 630 + 27 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10556001 + 10074276 = 3249^2 + 3174^2 .

It is not a de Polignac number, because 20630277 - 2⁶ = 20630213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20630277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20632277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1146118 + ... + 1146135.

Almost surely, 2^20630277 is an apocalyptic number.

It is an amenable number.

20630277 is a deficient number, since it is larger than the sum of its proper divisors (9169025).

20630277 is a wasteful number, since it uses less digits than its factorization.

20630277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292259 (or 2292256 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 20630277 is about 4542.0564725683. The cubic root of 20630277 is about 274.2637141720.

Adding to 20630277 its reverse (77203602), we get a palindrome (97833879).

The spelling of 20630277 in words is "twenty million, six hundred thirty thousand, two hundred seventy-seven".