21303203012 has 48 divisors (see below), whose sum is σ = 46245212160. Its totient is φ = 8361263232.

The previous prime is 21303202993. The next prime is 21303203021. The reversal of 21303203012 is 21030230312.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184187 + ... + 276642.

It is an arithmetic number, because the mean of its divisors is an integer number (963441920).

Almost surely, 2^21303203012 is an apocalyptic number.

It is an amenable number.

21303203012 is an abundant number, since it is smaller than the sum of its proper divisors (24942009148).

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

21303203012 is a wasteful number, since it uses less digits than its factorization.

21303203012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460980 (or 460978 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21303203012 its reverse (21030230312), we get a palindrome (42333433324).

The spelling of 21303203012 in words is "twenty-one billion, three hundred three million, two hundred three thousand, twelve".