20201100012 has 72 divisors (see below), whose sum is σ = 52495842672. Its totient is φ = 6545232000.

The previous prime is 20201099987. The next prime is 20201100071. The reversal of 20201100012 is 21000110202.

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 = 20201099967 and 20201100003.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1446262 + ... + 1460162.

It is an arithmetic number, because the mean of its divisors is an integer number (729108926).

Almost surely, 2^20201100012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20201100012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26247921336).

20201100012 is an abundant number, since it is smaller than the sum of its proper divisors (32294742660).

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

20201100012 is a wasteful number, since it uses less digits than its factorization.

20201100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15039 (or 15034 counting only the distinct ones).

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

Adding to 20201100012 its reverse (21000110202), we get a palindrome (41201210214).

The spelling of 20201100012 in words is "twenty billion, two hundred one million, one hundred thousand, twelve".