12381738503 has 4 divisors (see below), whose sum is σ = 13110076080. Its totient is φ = 11653400928.

The previous prime is 12381738451. The next prime is 12381738583. The reversal of 12381738503 is 30583718321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12381738503 - 2⁸ = 12381738247 is a prime.

It is a super-4 number, since 4×12381738503⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12381738583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364168763 + ... + 364168796.

It is an arithmetic number, because the mean of its divisors is an integer number (3277519020).

Almost surely, 2^12381738503 is an apocalyptic number.

12381738503 is a deficient number, since it is larger than the sum of its proper divisors (728337577).

12381738503 is an equidigital number, since it uses as much as digits as its factorization.

12381738503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728337576.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 12381738503 in words is "twelve billion, three hundred eighty-one million, seven hundred thirty-eight thousand, five hundred three".