20011212020 has 48 divisors (see below), whose sum is σ = 42575113728. Its totient is φ = 7899630720.

The previous prime is 20011211953. The next prime is 20011212059. The reversal of 20011212020 is 2021211002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20011211992 and 20011212010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1688957 + ... + 1700763.

It is an arithmetic number, because the mean of its divisors is an integer number (886981536).

Almost surely, 2^20011212020 is an apocalyptic number.

20011212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011212020 is an abundant number, since it is smaller than the sum of its proper divisors (22563901708).

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

20011212020 is a wasteful number, since it uses less digits than its factorization.

20011212020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12920 (or 12918 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20011212020 its reverse (2021211002), we get a palindrome (22032423022).

The spelling of 20011212020 in words is "twenty billion, eleven million, two hundred twelve thousand, twenty".