20100001012020 has 144 divisors (see below), whose sum is σ = 62938904770560. Its totient is φ = 5186921702400.

The previous prime is 20100001011997. The next prime is 20100001012061. The reversal of 20100001012020 is 2021010000102.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20100001011993 and 20100001012011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 282708636 + ... + 282779724.

Almost surely, 2^{20100001012020} is an apocalyptic number.

20100001012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100001012020 is an abundant number, since it is smaller than the sum of its proper divisors (42838903758540).

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

20100001012020 is a wasteful number, since it uses less digits than its factorization.

20100001012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121806 (or 121801 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20100001012020 its reverse (2021010000102), we get a palindrome (22121011012122).

The spelling of 20100001012020 in words is "twenty trillion, one hundred billion, one million, twelve thousand, twenty".