20672227 has 2 divisors, whose sum is σ = 20672228.
Its totient is φ = 20672226.
The previous prime is 20672131. The next prime is 20672231. The reversal of 20672227 is 72227602.
Adding to 20672227 its reverse (72227602), we get a palindrome (92899829).
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 20672227 - 211 = 20670179 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 20672195 and 20672204.
It is not a weakly prime, because it can be changed into another prime (20672237) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10336113 + 10336114.
It is an arithmetic number, because the mean of its divisors is an integer number (10336114).
Almost surely, 220672227 is an apocalyptic number.
20672227 is a deficient number, since it is larger than the sum of its proper divisors (1).
20672227 is an equidigital number, since it uses as much as digits as its factorization.
20672227 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 4704, while the sum is 28.
The square root of 20672227 is about 4546.6720796644.
The cubic root of 20672227 is about 274.4494860063.
The spelling of 20672227 in words is "twenty million, six hundred seventy-two thousand, two hundred twenty-seven".