205144210101020 has 24 divisors (see below), whose sum is σ = 430900241995104. Its totient is φ = 82039131510336.

The previous prime is 205144210100989. The next prime is 205144210101037. The reversal of 205144210101020 is 20101012441502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1159442459 + ... + 1159619378.

It is an arithmetic number, because the mean of its divisors is an integer number (17954176749796).

Almost surely, 2^{205144210101020} is an apocalyptic number.

205144210101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205144210101020 is an abundant number, since it is smaller than the sum of its proper divisors (225756031894084).

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

205144210101020 is a wasteful number, since it uses less digits than its factorization.

205144210101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319066269 (or 2319066267 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 205144210101020 its reverse (20101012441502), we get a palindrome (225245222542522).

The spelling of 205144210101020 in words is "two hundred five trillion, one hundred forty-four billion, two hundred ten million, one hundred one thousand, twenty".