11318279931 has 40 divisors (see below), whose sum is σ = 19332090624. Its totient is φ = 6464519280.

The previous prime is 11318279891. The next prime is 11318279957. The reversal of 11318279931 is 13997281311.

It is a happy number.

It is not a de Polignac number, because 11318279931 - 2⁶ = 11318279867 is a prime.

It is a super-2 number, since 2×11318279931² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11318279971) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1790266 + ... + 1796576.

Almost surely, 2^11318279931 is an apocalyptic number.

11318279931 is a deficient number, since it is larger than the sum of its proper divisors (8013810693).

11318279931 is an equidigital number, since it uses as much as digits as its factorization.

11318279931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9493 (or 9484 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The spelling of 11318279931 in words is "eleven billion, three hundred eighteen million, two hundred seventy-nine thousand, nine hundred thirty-one".