12605422420 has 12 divisors (see below), whose sum is σ = 26471387124. Its totient is φ = 5042168960.

The previous prime is 12605422391. The next prime is 12605422433. The reversal of 12605422420 is 2422450621.

It can be written as a sum of positive squares in 2 ways, for example, as 9875986884 + 2729435536 = 99378^2 + 52244^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315135541 + ... + 315135580.

It is an arithmetic number, because the mean of its divisors is an integer number (2205948927).

Almost surely, 2^12605422420 is an apocalyptic number.

12605422420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12605422420 is an abundant number, since it is smaller than the sum of its proper divisors (13865964704).

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

12605422420 is a wasteful number, since it uses less digits than its factorization.

12605422420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630271130 (or 630271128 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The spelling of 12605422420 in words is "twelve billion, six hundred five million, four hundred twenty-two thousand, four hundred twenty".