20213130312 has 128 divisors (see below), whose sum is σ = 57245443200. Its totient is φ = 6606662400.

The previous prime is 20213130211. The next prime is 20213130331. The reversal of 20213130312 is 21303131202.

20213130312 is a `hidden beast` number, since 20 + 21 + 313 + 0 + 312 = 666.

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 31 ways as a sum of consecutive naturals, for example, 4569862 + ... + 4574282.

It is an arithmetic number, because the mean of its divisors is an integer number (447230025).

Almost surely, 2^20213130312 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 20213130312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28622721600).

20213130312 is an abundant number, since it is smaller than the sum of its proper divisors (37032312888).

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

20213130312 is a wasteful number, since it uses less digits than its factorization.

20213130312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4844 (or 4834 counting only the distinct ones).

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

Adding to 20213130312 its reverse (21303131202), we get a palindrome (41516261514).

The spelling of 20213130312 in words is "twenty billion, two hundred thirteen million, one hundred thirty thousand, three hundred twelve".