20402967229 has 2 divisors, whose sum is σ = 20402967230. Its totient is φ = 20402967228.

The previous prime is 20402967217. The next prime is 20402967257. The reversal of 20402967229 is 92276920402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17527112100 + 2875855129 = 132390^2 + 53627^2 .

It is a cyclic number.

It is not a de Polignac number, because 20402967229 - 2²⁵ = 20369412797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20402967209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201483614 + 10201483615.

It is an arithmetic number, because the mean of its divisors is an integer number (10201483615).

Almost surely, 2^20402967229 is an apocalyptic number.

It is an amenable number.

20402967229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402967229 is an equidigital number, since it uses as much as digits as its factorization.

20402967229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 20402967229 in words is "twenty billion, four hundred two million, nine hundred sixty-seven thousand, two hundred twenty-nine".