205522040000 has 140 divisors (see below), whose sum is σ = 510788451624. Its totient is φ = 82021632000.

The previous prime is 205522039981. The next prime is 205522040011. The reversal of 205522040000 is 40225502.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18274379 + ... + 18285621.

Almost surely, 2^205522040000 is an apocalyptic number.

205522040000 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 205522040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255394225812).

205522040000 is an abundant number, since it is smaller than the sum of its proper divisors (305266411624).

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

205522040000 is an equidigital number, since it uses as much as digits as its factorization.

205522040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11732 (or 11707 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

Adding to 205522040000 its reverse (40225502), we get a palindrome (205562265502).

The spelling of 205522040000 in words is "two hundred five billion, five hundred twenty-two million, forty thousand".