20312112330 has 96 divisors (see below), whose sum is σ = 54556968960. Its totient is φ = 5237809920.

The previous prime is 20312112313. The next prime is 20312112347. The reversal of 20312112330 is 3321121302.

20312112330 is a `hidden beast` number, since 20 + 312 + 1 + 1 + 2 + 330 = 666.

It is an interprime number because it is at equal distance from previous prime (20312112313) and next prime (20312112347).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5754006 + ... + 5757534.

It is an arithmetic number, because the mean of its divisors is an integer number (568301760).

Almost surely, 2^20312112330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20312112330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27278484480).

20312112330 is an abundant number, since it is smaller than the sum of its proper divisors (34244856630).

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

20312112330 is a wasteful number, since it uses less digits than its factorization.

20312112330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5636 (or 5633 counting only the distinct ones).

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

Adding to 20312112330 its reverse (3321121302), we get a palindrome (23633233632).

The spelling of 20312112330 in words is "twenty billion, three hundred twelve million, one hundred twelve thousand, three hundred thirty".