11131818499 has 4 divisors (see below), whose sum is σ = 11135038320. Its totient is φ = 11128598680.

The previous prime is 11131818497. The next prime is 11131818547. The reversal of 11131818499 is 99481813111.

It is a happy number.

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 11131818499 - 2¹ = 11131818497 is a prime.

It is a super-2 number, since 2×11131818499² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11131818493) 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, 1604719 + ... + 1611640.

It is an arithmetic number, because the mean of its divisors is an integer number (2783759580).

Almost surely, 2^11131818499 is an apocalyptic number.

11131818499 is a deficient number, since it is larger than the sum of its proper divisors (3219821).

11131818499 is an equidigital number, since it uses as much as digits as its factorization.

11131818499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219820.

The product of its digits is 62208, while the sum is 46.

The spelling of 11131818499 in words is "eleven billion, one hundred thirty-one million, eight hundred eighteen thousand, four hundred ninety-nine".