12631353220 has 24 divisors (see below), whose sum is σ = 26921752704. Its totient is φ = 4977129696.

The previous prime is 12631353173. The next prime is 12631353269. The reversal of 12631353220 is 2235313621.

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, 4711852 + ... + 4714531.

It is an arithmetic number, because the mean of its divisors is an integer number (1121739696).

Almost surely, 2^12631353220 is an apocalyptic number.

12631353220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12631353220 is an abundant number, since it is smaller than the sum of its proper divisors (14290399484).

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

12631353220 is a wasteful number, since it uses less digits than its factorization.

12631353220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9426459 (or 9426457 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 12631353220 its reverse (2235313621), we get a palindrome (14866666841).

The spelling of 12631353220 in words is "twelve billion, six hundred thirty-one million, three hundred fifty-three thousand, two hundred twenty".