11111684947 has 6 divisors (see below), whose sum is σ = 12213670364. Its totient is φ = 10101531660.

The previous prime is 11111684939. The next prime is 11111684953. The reversal of 11111684947 is 74948611111.

It is not a de Polignac number, because 11111684947 - 2³ = 11111684939 is a prime.

It is a super-2 number, since 2×11111684947² (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 (11111681947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45915933 + ... + 45916174.

Almost surely, 2^11111684947 is an apocalyptic number.

11111684947 is a deficient number, since it is larger than the sum of its proper divisors (1101985417).

11111684947 is an equidigital number, since it uses as much as digits as its factorization.

11111684947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91832129 (or 91832118 counting only the distinct ones).

The product of its digits is 48384, while the sum is 43.

The spelling of 11111684947 in words is "eleven billion, one hundred eleven million, six hundred eighty-four thousand, nine hundred forty-seven".