11803438507 has 4 divisors (see below), whose sum is σ = 13489644016. Its totient is φ = 10117233000.

The previous prime is 11803438477. The next prime is 11803438513. The reversal of 11803438507 is 70583430811.

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

It is not a de Polignac number, because 11803438507 - 2³¹ = 9655954859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11803438507.

It is not an unprimeable number, because it can be changed into a prime (11803438597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 843102744 + ... + 843102757.

It is an arithmetic number, because the mean of its divisors is an integer number (3372411004).

Almost surely, 2^11803438507 is an apocalyptic number.

11803438507 is a deficient number, since it is larger than the sum of its proper divisors (1686205509).

11803438507 is an equidigital number, since it uses as much as digits as its factorization.

11803438507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686205508.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 11803438507 in words is "eleven billion, eight hundred three million, four hundred thirty-eight thousand, five hundred seven".