23311231020 has 144 divisors (see below), whose sum is σ = 88158889728. Its totient is φ = 4843889280.

The previous prime is 23311231001. The next prime is 23311231087. The reversal of 23311231020 is 2013211332.

23311231020 is a `hidden beast` number, since 2 + 331 + 1 + 2 + 310 + 20 = 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 = 23311230984 and 23311231002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 827094 + ... + 854813.

It is an arithmetic number, because the mean of its divisors is an integer number (612214512).

Almost surely, 2^23311231020 is an apocalyptic number.

23311231020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23311231020 is an abundant number, since it is smaller than the sum of its proper divisors (64847658708).

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

23311231020 is a wasteful number, since it uses less digits than its factorization.

23311231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681940 (or 1681935 counting only the distinct ones).

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

Adding to 23311231020 its reverse (2013211332), we get a palindrome (25324442352).

The spelling of 23311231020 in words is "twenty-three billion, three hundred eleven million, two hundred thirty-one thousand, twenty".