12409205530 has 16 divisors (see below), whose sum is σ = 22342023144. Its totient is φ = 4962470400.

The previous prime is 12409205513. The next prime is 12409205551. The reversal of 12409205530 is 3550290421.

It can be written as a sum of positive squares in 4 ways, for example, as 2636103649 + 9773101881 = 51343^2 + 98859^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12409205492 and 12409205501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107871 + ... + 190930.

Almost surely, 2^12409205530 is an apocalyptic number.

12409205530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12409205530 is a deficient number, since it is larger than the sum of its proper divisors (9932817614).

12409205530 is a wasteful number, since it uses less digits than its factorization.

12409205530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302961.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 12409205530 its reverse (3550290421), we get a palindrome (15959495951).

The spelling of 12409205530 in words is "twelve billion, four hundred nine million, two hundred five thousand, five hundred thirty".