12258156420 has 36 divisors (see below), whose sum is σ = 37183075020. Its totient is φ = 3268841664.

The previous prime is 12258156397. The next prime is 12258156437. The reversal of 12258156420 is 2465185221.

12258156420 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 8 + 1 + 5 + 642 + 0 = 666.

12258156420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7796183616 + 4461972804 = 88296^2 + 66798^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34050255 + ... + 34050614.

It is an arithmetic number, because the mean of its divisors is an integer number (1032863195).

Almost surely, 2^12258156420 is an apocalyptic number.

12258156420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12258156420 is an abundant number, since it is smaller than the sum of its proper divisors (24924918600).

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

12258156420 is a wasteful number, since it uses less digits than its factorization.

12258156420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68100884 (or 68100879 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The spelling of 12258156420 in words is "twelve billion, two hundred fifty-eight million, one hundred fifty-six thousand, four hundred twenty".