20012012002000 has 40 divisors (see below), whose sum is σ = 48389045025672. Its totient is φ = 8004804800000.

The previous prime is 20012012001973. The next prime is 20012012002009. The reversal of 20012012002000 is 20021021002.

It can be written as a sum of positive squares in 4 ways, for example, as 990738576 + 20011021263424 = 31476^2 + 4473368^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012012002009) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5003001001 + ... + 5003005000.

Almost surely, 2^{20012012002000} is an apocalyptic number.

20012012002000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012012002000 is an abundant number, since it is smaller than the sum of its proper divisors (28377033023672).

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

20012012002000 is a wasteful number, since it uses less digits than its factorization.

20012012002000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006006024 (or 10006006008 counting only the distinct ones).

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

Adding to 20012012002000 its reverse (20021021002), we get a palindrome (20032033023002).

The spelling of 20012012002000 in words is "twenty trillion, twelve billion, twelve million, two thousand".