12340443420 has 96 divisors (see below), whose sum is σ = 39631011840. Its totient is φ = 3184626240.

The previous prime is 12340443407. The next prime is 12340443433. The reversal of 12340443420 is 2434404321.

It is a happy number.

12340443420 is a `hidden beast` number, since 1 + 234 + 0 + 4 + 4 + 3 + 420 = 666.

It is an interprime number because it is at equal distance from previous prime (12340443407) and next prime (12340443433).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 351852 + ... + 385331.

It is an arithmetic number, because the mean of its divisors is an integer number (412823040).

Almost surely, 2^12340443420 is an apocalyptic number.

12340443420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12340443420 is an abundant number, since it is smaller than the sum of its proper divisors (27290568420).

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

12340443420 is a wasteful number, since it uses less digits than its factorization.

12340443420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737232 (or 737224 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 12340443420 its reverse (2434404321), we get a palindrome (14774847741).

The spelling of 12340443420 in words is "twelve billion, three hundred forty million, four hundred forty-three thousand, four hundred twenty".