20313201312 has 144 divisors (see below), whose sum is σ = 58517327232. Its totient is φ = 6683558400.

The previous prime is 20313201301. The next prime is 20313201343. The reversal of 20313201312 is 21310231302.

20313201312 is a `hidden beast` number, since 2 + 0 + 31 + 320 + 1 + 312 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×20313201312² (a number of 21 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 7261098 + ... + 7263894.

It is an arithmetic number, because the mean of its divisors is an integer number (406370328).

Almost surely, 2^20313201312 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 20313201312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29258663616).

20313201312 is an abundant number, since it is smaller than the sum of its proper divisors (38204125920).

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

20313201312 is a wasteful number, since it uses less digits than its factorization.

20313201312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131 (or 3120 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20313201312 its reverse (21310231302), we get a palindrome (41623432614).

The spelling of 20313201312 in words is "twenty billion, three hundred thirteen million, two hundred one thousand, three hundred twelve".