20305003212 has 126 divisors (see below), whose sum is σ = 57691080132. Its totient is φ = 6247541664.

The previous prime is 20305003207. The next prime is 20305003241. The reversal of 20305003212 is 21230050302.

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

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 472203 + ... + 513405.

Almost surely, 2^20305003212 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 20305003212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28845540066).

20305003212 is an abundant number, since it is smaller than the sum of its proper divisors (37386076920).

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

20305003212 is a wasteful number, since it uses less digits than its factorization.

20305003212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41251 (or 41221 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

Adding to 20305003212 its reverse (21230050302), we get a palindrome (41535053514).

The spelling of 20305003212 in words is "twenty billion, three hundred five million, three thousand, two hundred twelve".