206353122340 has 24 divisors (see below), whose sum is σ = 433523962872. Its totient is φ = 82506504960.

The previous prime is 206353122307. The next prime is 206353122341. The reversal of 206353122340 is 43221353602.

It can be written as a sum of positive squares in 4 ways, for example, as 4292084196 + 202061038144 = 65514^2 + 449512^2 .

It is a super-2 number, since 2×206353122340² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (206353122341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2122771 + ... + 2217850.

It is an arithmetic number, because the mean of its divisors is an integer number (18063498453).

Almost surely, 2^206353122340 is an apocalyptic number.

206353122340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206353122340 is an abundant number, since it is smaller than the sum of its proper divisors (227170840532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206353122340 is a wasteful number, since it uses less digits than its factorization.

206353122340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4343007 (or 4343005 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

Adding to 206353122340 its reverse (43221353602), we get a palindrome (249574475942).

The spelling of 206353122340 in words is "two hundred six billion, three hundred fifty-three million, one hundred twenty-two thousand, three hundred forty".