20763229 has 2 divisors, whose sum is σ = 20763230.
Its totient is φ = 20763228.
The previous prime is 20763203. The next prime is 20763247. The reversal of 20763229 is 92236702.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 15132100 + 5631129 = 3890^2 + 2373^2
It is a cyclic number.
It is not a de Polignac number, because 20763229 - 213 = 20755037 is a prime.
It is a super-2 number, since 2×207632292 = 862223357012882, which contains 22 as substring.
It is a Chen prime.
It is a self number, because there is not a number n which added to its sum of digits gives 20763229.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (20763269) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10381614 + 10381615.
It is an arithmetic number, because the mean of its divisors is an integer number (10381615).
Almost surely, 220763229 is an apocalyptic number.
It is an amenable number.
20763229 is a deficient number, since it is larger than the sum of its proper divisors (1).
20763229 is an equidigital number, since it uses as much as digits as its factorization.
20763229 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 9072, while the sum is 31.
The square root of 20763229 is about 4556.6686296021.
The cubic root of 20763229 is about 274.8516180234.
It can be divided in two parts, 207 and 63229, that added together give a palindrome (63436).
The spelling of 20763229 in words is "twenty million, seven hundred sixty-three thousand, two hundred twenty-nine".