12055505420 has 48 divisors (see below), whose sum is σ = 28984253760. Its totient is φ = 4126024704.

The previous prime is 12055505419. The next prime is 12055505447. The reversal of 12055505420 is 2450555021.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3992 + ... + 155328.

It is an arithmetic number, because the mean of its divisors is an integer number (603838620).

Almost surely, 2^12055505420 is an apocalyptic number.

12055505420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12055505420 is an abundant number, since it is smaller than the sum of its proper divisors (16928748340).

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

12055505420 is a wasteful number, since it uses less digits than its factorization.

12055505420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151922 (or 151920 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The spelling of 12055505420 in words is "twelve billion, fifty-five million, five hundred five thousand, four hundred twenty".