20627297 has 6 divisors (see below), whose sum is σ = 21563682. Its totient is φ = 19729952.

The previous prime is 20627291. The next prime is 20627311. The reversal of 20627297 is 79272602.

It can be written as a sum of positive squares in only one way, i.e., 15649936 + 4977361 = 3956^2 + 2231^2 .

It is not a de Polignac number, because 20627297 - 2⁴ = 20627281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20627291) 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, 18968 + ... + 20025.

It is an arithmetic number, because the mean of its divisors is an integer number (3593947).

Almost surely, 2^20627297 is an apocalyptic number.

It is an amenable number.

20627297 is a deficient number, since it is larger than the sum of its proper divisors (936385).

20627297 is an equidigital number, since it uses as much as digits as its factorization.

20627297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39039 (or 39016 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 20627297 is about 4541.7284154824. The cubic root of 20627297 is about 274.2505079311.

Adding to 20627297 its reverse (79272602), we get a palindrome (99899899).

The spelling of 20627297 in words is "twenty million, six hundred twenty-seven thousand, two hundred ninety-seven".