20001201209960 has 32 divisors (see below), whose sum is σ = 45002841062400. Its totient is φ = 8000455890240.

The previous prime is 20001201209959. The next prime is 20001201210037. The reversal of 20001201209960 is 6990210210002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18164345 + ... + 19233975.

It is an arithmetic number, because the mean of its divisors is an integer number (1406338783200).

Almost surely, 2^{20001201209960} is an apocalyptic number.

20001201209960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001201209960 is an abundant number, since it is smaller than the sum of its proper divisors (25001639852440).

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

20001201209960 is a wasteful number, since it uses less digits than its factorization.

20001201209960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537121 (or 1537117 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

Adding to 20001201209960 its reverse (6990210210002), we get a palindrome (26991411419962).

The spelling of 20001201209960 in words is "twenty trillion, one billion, two hundred one million, two hundred nine thousand, nine hundred sixty".