12312232020 has 144 divisors (see below), whose sum is σ = 41002835328. Its totient is φ = 2965697280.

The previous prime is 12312231949. The next prime is 12312232021. The reversal of 12312232020 is 2023221321.

12312232020 is a `hidden beast` number, since 12 + 312 + 2 + 320 + 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 = 12312231984 and 12312232002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312232021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 291057 + ... + 330663.

It is an arithmetic number, because the mean of its divisors is an integer number (284741912).

Almost surely, 2^12312232020 is an apocalyptic number.

12312232020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12312232020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20501417664).

12312232020 is an abundant number, since it is smaller than the sum of its proper divisors (28690603308).

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

12312232020 is a wasteful number, since it uses less digits than its factorization.

12312232020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39790 (or 39785 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 12312232020 its reverse (2023221321), we get a palindrome (14335453341).

The spelling of 12312232020 in words is "twelve billion, three hundred twelve million, two hundred thirty-two thousand, twenty".