20031210012 has 96 divisors (see below), whose sum is σ = 52339650048. Its totient is φ = 5911200000.

The previous prime is 20031209983. The next prime is 20031210019. The reversal of 20031210012 is 21001213002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 20031210012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031210019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 800937 + ... + 825567.

It is an arithmetic number, because the mean of its divisors is an integer number (545204688).

Almost surely, 2^20031210012 is an apocalyptic number.

20031210012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20031210012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26169825024).

20031210012 is an abundant number, since it is smaller than the sum of its proper divisors (32308440036).

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

20031210012 is a wasteful number, since it uses less digits than its factorization.

20031210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24811 (or 24809 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20031210012 its reverse (21001213002), we get a palindrome (41032423014).

The spelling of 20031210012 in words is "twenty billion, thirty-one million, two hundred ten thousand, twelve".