12320031420 has 96 divisors (see below), whose sum is σ = 39995504640. Its totient is φ = 3142497600.

The previous prime is 12320031349. The next prime is 12320031421. The reversal of 12320031420 is 2413002321.

12320031420 is a `hidden beast` number, since 12 + 3 + 200 + 31 + 420 = 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 = 12320031393 and 12320031402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320031421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 483556 + ... + 508395.

It is an arithmetic number, because the mean of its divisors is an integer number (416619840).

Almost surely, 2^12320031420 is an apocalyptic number.

12320031420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12320031420 is an abundant number, since it is smaller than the sum of its proper divisors (27675473220).

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

12320031420 is a wasteful number, since it uses less digits than its factorization.

12320031420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991992 (or 991984 counting only the distinct ones).

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

Adding to 12320031420 its reverse (2413002321), we get a palindrome (14733033741).

The spelling of 12320031420 in words is "twelve billion, three hundred twenty million, thirty-one thousand, four hundred twenty".