20003220612 has 144 divisors (see below), whose sum is σ = 57793357440. Its totient is φ = 5795564544.

The previous prime is 20003220581. The next prime is 20003220613. The reversal of 20003220612 is 21602230002.

20003220612 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 32 + 20 + 612 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20003220613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 383703 + ... + 432705.

It is an arithmetic number, because the mean of its divisors is an integer number (401342760).

Almost surely, 2^20003220612 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 20003220612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28896678720).

20003220612 is an abundant number, since it is smaller than the sum of its proper divisors (37790136828).

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

20003220612 is a wasteful number, since it uses less digits than its factorization.

20003220612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49082 (or 49077 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20003220612 its reverse (21602230002), we get a palindrome (41605450614).

The spelling of 20003220612 in words is "twenty billion, three million, two hundred twenty thousand, six hundred twelve".