20001220200010 has 32 divisors (see below), whose sum is σ = 41166675349632. Its totient is φ = 6854009864640.

The previous prime is 20001220200007. The next prime is 20001220200011. The reversal of 20001220200010 is 1000202210002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 20001220200010.

It is not an unprimeable number, because it can be changed into a prime (20001220200011) 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, 73850257 + ... + 74120596.

It is an arithmetic number, because the mean of its divisors is an integer number (1286458604676).

Almost surely, 2^{20001220200010} is an apocalyptic number.

20001220200010 is an abundant number, since it is smaller than the sum of its proper divisors (21165455149622).

20001220200010 is a wasteful number, since it uses less digits than its factorization.

20001220200010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147972798.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20001220200010 its reverse (1000202210002), we get a palindrome (21001422410012).

The spelling of 20001220200010 in words is "twenty trillion, one billion, two hundred twenty million, two hundred thousand, ten".