20111001002020 has 48 divisors (see below), whose sum is σ = 42864146680320. Its totient is φ = 7924205355264.

The previous prime is 20111001001943. The next prime is 20111001002033. The reversal of 20111001002020 is 2020010011102.

It is a super-2 number, since 2×20111001002020² (a number of 27 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 20111001001988 and 20111001002006.

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, 164073997 + ... + 164196523.

It is an arithmetic number, because the mean of its divisors is an integer number (893003055840).

Almost surely, 2^{20111001002020} is an apocalyptic number.

20111001002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111001002020 is an abundant number, since it is smaller than the sum of its proper divisors (22753145678300).

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

20111001002020 is a wasteful number, since it uses less digits than its factorization.

20111001002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245092 (or 245090 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20111001002020 its reverse (2020010011102), we get a palindrome (22131011013122).

The spelling of 20111001002020 in words is "twenty trillion, one hundred eleven billion, one million, two thousand, twenty".