20530277 has 4 divisors (see below), whose sum is σ = 21192576. Its totient is φ = 19867980.

The previous prime is 20530273. The next prime is 20530291. The reversal of 20530277 is 77203502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20530277 - 2² = 20530273 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331103 + ... + 331164.

It is an arithmetic number, because the mean of its divisors is an integer number (5298144).

Almost surely, 2^20530277 is an apocalyptic number.

It is an amenable number.

20530277 is a deficient number, since it is larger than the sum of its proper divisors (662299).

20530277 is an equidigital number, since it uses as much as digits as its factorization.

20530277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662298.

The product of its (nonzero) digits is 2940, while the sum is 26.

The square root of 20530277 is about 4531.0348707552. The cubic root of 20530277 is about 273.8198551253.

Adding to 20530277 its reverse (77203502), we get a palindrome (97733779).

It can be divided in two parts, 205302 and 77, that added together give a cube (205379 = 59³).

The spelling of 20530277 in words is "twenty million, five hundred thirty thousand, two hundred seventy-seven".