20121316503 has 8 divisors (see below), whose sum is σ = 26859657600. Its totient is φ = 13398593208.

The previous prime is 20121316489. The next prime is 20121316507. The reversal of 20121316503 is 30561312102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20121316503 - 2⁴ = 20121316487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121316507) 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, 3901443 + ... + 3906596.

It is an arithmetic number, because the mean of its divisors is an integer number (3357457200).

Almost surely, 2^20121316503 is an apocalyptic number.

20121316503 is a deficient number, since it is larger than the sum of its proper divisors (6738341097).

20121316503 is an equidigital number, since it uses as much as digits as its factorization.

20121316503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7808901.

The product of its (nonzero) digits is 1080, while the sum is 24.

Adding to 20121316503 its reverse (30561312102), we get a palindrome (50682628605).

The spelling of 20121316503 in words is "twenty billion, one hundred twenty-one million, three hundred sixteen thousand, five hundred three".