12451202320 has 20 divisors (see below), whose sum is σ = 28949045580. Its totient is φ = 4980480896.

The previous prime is 12451202311. The next prime is 12451202333. The reversal of 12451202320 is 2320215421.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9656599824 + 2794602496 = 98268^2 + 52864^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 12451202291 and 12451202300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77819935 + ... + 77820094.

It is an arithmetic number, because the mean of its divisors is an integer number (1447452279).

Almost surely, 2^12451202320 is an apocalyptic number.

12451202320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12451202320 is an abundant number, since it is smaller than the sum of its proper divisors (16497843260).

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

12451202320 is a wasteful number, since it uses less digits than its factorization.

12451202320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155640042 (or 155640036 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 12451202320 its reverse (2320215421), we get a palindrome (14771417741).

The spelling of 12451202320 in words is "twelve billion, four hundred fifty-one million, two hundred two thousand, three hundred twenty".