12503215420 has 48 divisors (see below), whose sum is σ = 28392819840. Its totient is φ = 4606936064.

The previous prime is 12503215397. The next prime is 12503215427. The reversal of 12503215420 is 2451230521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12503215427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375235 + ... + 407194.

It is an arithmetic number, because the mean of its divisors is an integer number (591517080).

Almost surely, 2^12503215420 is an apocalyptic number.

12503215420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12503215420 is an abundant number, since it is smaller than the sum of its proper divisors (15889604420).

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

12503215420 is a wasteful number, since it uses less digits than its factorization.

12503215420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782502 (or 782500 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 12503215420 its reverse (2451230521), we get a palindrome (14954445941).

The spelling of 12503215420 in words is "twelve billion, five hundred three million, two hundred fifteen thousand, four hundred twenty".