20311233030 has 128 divisors (see below), whose sum is σ = 59576601600. Its totient is φ = 4923848160.

The previous prime is 20311233023. The next prime is 20311233043. The reversal of 20311233030 is 3033211302.

20311233030 is a `hidden beast` number, since 20 + 311 + 2 + 330 + 3 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 20311232994 and 20311233012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 331111 + ... + 387629.

It is an arithmetic number, because the mean of its divisors is an integer number (465442200).

Almost surely, 2^20311233030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20311233030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29788300800).

20311233030 is an abundant number, since it is smaller than the sum of its proper divisors (39265368570).

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

20311233030 is a wasteful number, since it uses less digits than its factorization.

20311233030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56568 (or 56540 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 20311233030 its reverse (3033211302), we get a palindrome (23344444332).

The spelling of 20311233030 in words is "twenty billion, three hundred eleven million, two hundred thirty-three thousand, thirty".