206220005345429 has 2 divisors, whose sum is σ = 206220005345430. Its totient is φ = 206220005345428.

The previous prime is 206220005345369. The next prime is 206220005345479. The reversal of 206220005345429 is 924543500022602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185897490542929 + 20322514802500 = 13634423^2 + 4508050^2 .

It is a cyclic number.

It is not a de Polignac number, because 206220005345429 - 2¹² = 206220005341333 is a prime.

It is a super-2 number, since 2×206220005345429² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 206220005345429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206220005345479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103110002672714 + 103110002672715.

It is an arithmetic number, because the mean of its divisors is an integer number (103110002672715).

Almost surely, 2^{206220005345429} is an apocalyptic number.

It is an amenable number.

206220005345429 is a deficient number, since it is larger than the sum of its proper divisors (1).

206220005345429 is an equidigital number, since it uses as much as digits as its factorization.

206220005345429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 206220005345429 in words is "two hundred six trillion, two hundred twenty billion, five million, three hundred forty-five thousand, four hundred twenty-nine".