23311012320 has 144 divisors (see below), whose sum is σ = 81698984640. Its totient is φ = 6048248832.

The previous prime is 23311012297. The next prime is 23311012321. The reversal of 23311012320 is 2321011332.

23311012320 is a `hidden beast` number, since 2 + 331 + 1 + 0 + 12 + 320 = 666.

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

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 = 23311012293 and 23311012302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311012321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165480 + ... + 272039.

It is an arithmetic number, because the mean of its divisors is an integer number (567354060).

Almost surely, 2^23311012320 is an apocalyptic number.

23311012320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23311012320 is an abundant number, since it is smaller than the sum of its proper divisors (58387972320).

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

23311012320 is a wasteful number, since it uses less digits than its factorization.

23311012320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437577 (or 437566 counting only the distinct ones).

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

Adding to 23311012320 its reverse (2321011332), we get a palindrome (25632023652).

It can be divided in two parts, 23311012 and 320, that added together give a palindrome (23311332).

The spelling of 23311012320 in words is "twenty-three billion, three hundred eleven million, twelve thousand, three hundred twenty".