12511340420 has 24 divisors (see below), whose sum is σ = 26386587864. Its totient is φ = 4983055616.

The previous prime is 12511340353. The next prime is 12511340423. The reversal of 12511340420 is 2404311521.

It can be written as a sum of positive squares in 4 ways, for example, as 23104 + 12511317316 = 152^2 + 111854^2 .

It is not an unprimeable number, because it can be changed into a prime (12511340423) 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, 1337759 + ... + 1347078.

It is an arithmetic number, because the mean of its divisors is an integer number (1099441161).

Almost surely, 2^12511340420 is an apocalyptic number.

12511340420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12511340420 is an abundant number, since it is smaller than the sum of its proper divisors (13875247444).

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

12511340420 is a wasteful number, since it uses less digits than its factorization.

12511340420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2685079 (or 2685077 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 12511340420 its reverse (2404311521), we get a palindrome (14915651941).

The spelling of 12511340420 in words is "twelve billion, five hundred eleven million, three hundred forty thousand, four hundred twenty".