12442422420 has 48 divisors (see below), whose sum is σ = 38709760320. Its totient is φ = 3317979168.

The previous prime is 12442422407. The next prime is 12442422437. The reversal of 12442422420 is 2422424421.

12442422420 is a `hidden beast` number, since 12 + 4 + 424 + 224 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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, 11520222 + ... + 11521301.

It is an arithmetic number, because the mean of its divisors is an integer number (806453340).

Almost surely, 2^12442422420 is an apocalyptic number.

12442422420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12442422420 is an abundant number, since it is smaller than the sum of its proper divisors (26267337900).

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

12442422420 is a wasteful number, since it uses less digits than its factorization.

12442422420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23041541 (or 23041533 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 12442422420 its reverse (2422424421), we get a palindrome (14864846841).

The spelling of 12442422420 in words is "twelve billion, four hundred forty-two million, four hundred twenty-two thousand, four hundred twenty".