11503836394 has 4 divisors (see below), whose sum is σ = 17255754594. Its totient is φ = 5751918196.

The previous prime is 11503836391. The next prime is 11503836479. The reversal of 11503836394 is 49363830511.

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

It can be written as a sum of positive squares in only one way, i.e., 6158325625 + 5345510769 = 78475^2 + 73113^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11503836394.

It is not an unprimeable number, because it can be changed into a prime (11503836391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2875959097 + ... + 2875959100.

Almost surely, 2^11503836394 is an apocalyptic number.

11503836394 is a deficient number, since it is larger than the sum of its proper divisors (5751918200).

11503836394 is an equidigital number, since it uses as much as digits as its factorization.

11503836394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5751918199.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 11503836394 in words is "eleven billion, five hundred three million, eight hundred thirty-six thousand, three hundred ninety-four".