12340204020 has 36 divisors (see below), whose sum is σ = 37431952740. Its totient is φ = 3290721024.

The previous prime is 12340204003. The next prime is 12340204057. The reversal of 12340204020 is 2040204321.

It can be written as a sum of positive squares in 2 ways, for example, as 8745242256 + 3594961764 = 93516^2 + 59958^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 = 12340203984 and 12340204002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34278165 + ... + 34278524.

It is an arithmetic number, because the mean of its divisors is an integer number (1039776465).

Almost surely, 2^12340204020 is an apocalyptic number.

12340204020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12340204020 is an abundant number, since it is smaller than the sum of its proper divisors (25091748720).

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

12340204020 is a wasteful number, since it uses less digits than its factorization.

12340204020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68556704 (or 68556699 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 12340204020 its reverse (2040204321), we get a palindrome (14380408341).

The spelling of 12340204020 in words is "twelve billion, three hundred forty million, two hundred four thousand, twenty".