11205893947 has 4 divisors (see below), whose sum is σ = 11213848440. Its totient is φ = 11197939456.

The previous prime is 11205893911. The next prime is 11205893977. The reversal of 11205893947 is 74939850211.

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 11205893947 - 2⁷ = 11205893819 is a prime.

It is a super-2 number, since 2×11205893947² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 11205893947.

It is not an unprimeable number, because it can be changed into a prime (11205893977) 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, 3975133 + ... + 3977950.

It is an arithmetic number, because the mean of its divisors is an integer number (2803462110).

Almost surely, 2^11205893947 is an apocalyptic number.

11205893947 is a deficient number, since it is larger than the sum of its proper divisors (7954493).

11205893947 is an equidigital number, since it uses as much as digits as its factorization.

11205893947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7954492.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 11205893947 in words is "eleven billion, two hundred five million, eight hundred ninety-three thousand, nine hundred forty-seven".