20021310312 has 64 divisors (see below), whose sum is σ = 53016145920. Its totient is φ = 6278995968.

The previous prime is 20021310311. The next prime is 20021310341. The reversal of 20021310312 is 21301312002.

It is a junction number, because it is equal to n+sod(n) for n = 20021310291 and 20021310300.

It is not an unprimeable number, because it can be changed into a prime (20021310311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1468953 + ... + 1482519.

It is an arithmetic number, because the mean of its divisors is an integer number (828377280).

Almost surely, 2^20021310312 is an apocalyptic number.

It is an amenable number.

20021310312 is an abundant number, since it is smaller than the sum of its proper divisors (32994835608).

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

20021310312 is a wasteful number, since it uses less digits than its factorization.

20021310312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17210 (or 17206 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20021310312 its reverse (21301312002), we get a palindrome (41322622314).

The spelling of 20021310312 in words is "twenty billion, twenty-one million, three hundred ten thousand, three hundred twelve".