20007229 has 6 divisors (see below), whose sum is σ = 21991550. Its totient is φ = 18188280.

The previous prime is 20007223. The next prime is 20007257. The reversal of 20007229 is 92270002.

It can be written as a sum of positive squares in only one way, i.e., 14822500 + 5184729 = 3850^2 + 2277^2 .

It is not a de Polignac number, because 20007229 - 2⁹ = 20006717 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 (20007223) 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, 82554 + ... + 82795.

Almost surely, 2^20007229 is an apocalyptic number.

It is an amenable number.

20007229 is a deficient number, since it is larger than the sum of its proper divisors (1984321).

20007229 is a wasteful number, since it uses less digits than its factorization.

20007229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165371 (or 165360 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 20007229 is about 4472.9441087499. The cubic root of 20007229 is about 271.4744619282.

It can be divided in two parts, 2000 and 7229, that added together give a palindrome (9229).

The spelling of 20007229 in words is "twenty million, seven thousand, two hundred twenty-nine".