206313615340 has 96 divisors (see below), whose sum is σ = 524592319104. Its totient is φ = 66535403520.

The previous prime is 206313615331. The next prime is 206313615341. The reversal of 206313615340 is 43516313602.

It is a super-2 number, since 2×206313615340² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 206313615296 and 206313615305.

It is not an unprimeable number, because it can be changed into a prime (206313615341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4099530 + ... + 4149550.

It is an arithmetic number, because the mean of its divisors is an integer number (5464503324).

Almost surely, 2^206313615340 is an apocalyptic number.

206313615340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206313615340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262296159552).

206313615340 is an abundant number, since it is smaller than the sum of its proper divisors (318278703764).

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

206313615340 is a wasteful number, since it uses less digits than its factorization.

206313615340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51787 (or 51785 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

Adding to 206313615340 its reverse (43516313602), we get a palindrome (249829928942).

The spelling of 206313615340 in words is "two hundred six billion, three hundred thirteen million, six hundred fifteen thousand, three hundred forty".