205266327420 has 192 divisors, whose sum is σ = 717050880000. Its totient is φ = 42623888640.

The previous prime is 205266327397. The next prime is 205266327437. The reversal of 205266327420 is 24723662502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7188331 + ... + 7216829.

It is an arithmetic number, because the mean of its divisors is an integer number (3734640000).

Almost surely, 2^205266327420 is an apocalyptic number.

205266327420 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 205266327420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358525440000).

205266327420 is an abundant number, since it is smaller than the sum of its proper divisors (511784552580).

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

205266327420 is a wasteful number, since it uses less digits than its factorization.

205266327420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30088 (or 30086 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 39.

Adding to 205266327420 its reverse (24723662502), we get a palindrome (229989989922).

The spelling of 205266327420 in words is "two hundred five billion, two hundred sixty-six million, three hundred twenty-seven thousand, four hundred twenty".