205032131551020 has 48 divisors (see below), whose sum is σ = 580540417440480. Its totient is φ = 54060906594816.

The previous prime is 205032131550997. The next prime is 205032131551021. The reversal of 205032131551020 is 20155131230502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (205032131551021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19197759787 + ... + 19197770466.

It is an arithmetic number, because the mean of its divisors is an integer number (12094592030010).

Almost surely, 2^{205032131551020} is an apocalyptic number.

205032131551020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205032131551020 is an abundant number, since it is smaller than the sum of its proper divisors (375508285889460).

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

205032131551020 is a wasteful number, since it uses less digits than its factorization.

205032131551020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38395530354 (or 38395530352 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 205032131551020 its reverse (20155131230502), we get a palindrome (225187262781522).

The spelling of 205032131551020 in words is "two hundred five trillion, thirty-two billion, one hundred thirty-one million, five hundred fifty-one thousand, twenty".