12144203420 has 24 divisors (see below), whose sum is σ = 25509460704. Its totient is φ = 4856417856.

The previous prime is 12144203417. The next prime is 12144203431. The reversal of 12144203420 is 2430244121.

It is a super-3 number, since 3×12144203420³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1862 + ... + 155858.

It is an arithmetic number, because the mean of its divisors is an integer number (1062894196).

Almost surely, 2^12144203420 is an apocalyptic number.

12144203420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12144203420 is an abundant number, since it is smaller than the sum of its proper divisors (13365257284).

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

12144203420 is a wasteful number, since it uses less digits than its factorization.

12144203420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157949 (or 157947 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12144203420 its reverse (2430244121), we get a palindrome (14574447541).

The spelling of 12144203420 in words is "twelve billion, one hundred forty-four million, two hundred three thousand, four hundred twenty".