20001231312 has 20 divisors (see below), whose sum is σ = 51669847680. Its totient is φ = 6667077088.

The previous prime is 20001231287. The next prime is 20001231337. The reversal of 20001231312 is 21313210002.

It is an interprime number because it is at equal distance from previous prime (20001231287) and next prime (20001231337).

It is a super-2 number, since 2×20001231312² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20001231291 and 20001231300.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 208346112 + ... + 208346207.

It is an arithmetic number, because the mean of its divisors is an integer number (2583492384).

Almost surely, 2^20001231312 is an apocalyptic number.

It is an amenable number.

20001231312 is an abundant number, since it is smaller than the sum of its proper divisors (31668616368).

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

20001231312 is a wasteful number, since it uses less digits than its factorization.

20001231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416692330 (or 416692324 counting only the distinct ones).

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

Adding to 20001231312 its reverse (21313210002), we get a palindrome (41314441314).

The spelling of 20001231312 in words is "twenty billion, one million, two hundred thirty-one thousand, three hundred twelve".