12420855580 has 96 divisors (see below), whose sum is σ = 30275481600. Its totient is φ = 4192411392.

The previous prime is 12420855553. The next prime is 12420855583. The reversal of 12420855580 is 8555802421.

It is a super-3 number, since 3×12420855580³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420855583) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4300897 + ... + 4303783.

It is an arithmetic number, because the mean of its divisors is an integer number (315369600).

Almost surely, 2^12420855580 is an apocalyptic number.

12420855580 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 12420855580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15137740800).

12420855580 is an abundant number, since it is smaller than the sum of its proper divisors (17854626020).

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

12420855580 is a wasteful number, since it uses less digits than its factorization.

12420855580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371 (or 3369 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 40.

The spelling of 12420855580 in words is "twelve billion, four hundred twenty million, eight hundred fifty-five thousand, five hundred eighty".