12402345220 has 24 divisors (see below), whose sum is σ = 26401707864. Its totient is φ = 4892979456.

The previous prime is 12402345217. The next prime is 12402345229. The reversal of 12402345220 is 2254320421.

It can be written as a sum of positive squares in 4 ways, for example, as 3861628164 + 8540717056 = 62142^2 + 92416^2 .

It is not an unprimeable number, because it can be changed into a prime (12402345229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4245919 + ... + 4248838.

It is an arithmetic number, because the mean of its divisors is an integer number (1100071161).

Almost surely, 2^12402345220 is an apocalyptic number.

12402345220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12402345220 is an abundant number, since it is smaller than the sum of its proper divisors (13999362644).

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

12402345220 is a wasteful number, since it uses less digits than its factorization.

12402345220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8494839 (or 8494837 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 12402345220 its reverse (2254320421), we get a palindrome (14656665641).

The spelling of 12402345220 in words is "twelve billion, four hundred two million, three hundred forty-five thousand, two hundred twenty".