20100001200020 has 48 divisors (see below), whose sum is σ = 48587053307520. Its totient is φ = 6841850350464.

The previous prime is 20100001199989. The next prime is 20100001200067. The reversal of 20100001200020 is 2000210000102.

It is a junction number, because it is equal to n+sod(n) for n = 20100001199980 and 20100001200007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516424559 + ... + 516463478.

It is an arithmetic number, because the mean of its divisors is an integer number (1012230277240).

Almost surely, 2^{20100001200020} is an apocalyptic number.

20100001200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100001200020 is an abundant number, since it is smaller than the sum of its proper divisors (28487052107500).

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

20100001200020 is a wasteful number, since it uses less digits than its factorization.

20100001200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032888192 (or 1032888190 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 20100001200020 its reverse (2000210000102), we get a palindrome (22100211200122).

The spelling of 20100001200020 in words is "twenty trillion, one hundred billion, one million, two hundred thousand, twenty".