12016215420 has 96 divisors (see below), whose sum is σ = 36862076160. Its totient is φ = 2900482560.

The previous prime is 12016215413. The next prime is 12016215439. The reversal of 12016215420 is 2451261021.

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, 114711 + ... + 192849.

It is an arithmetic number, because the mean of its divisors is an integer number (383979960).

Almost surely, 2^12016215420 is an apocalyptic number.

12016215420 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 12016215420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18431038080).

12016215420 is an abundant number, since it is smaller than the sum of its proper divisors (24845860740).

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

12016215420 is a wasteful number, since it uses less digits than its factorization.

12016215420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78395 (or 78393 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 12016215420 its reverse (2451261021), we get a palindrome (14467476441).

The spelling of 12016215420 in words is "twelve billion, sixteen million, two hundred fifteen thousand, four hundred twenty".