11409205931 has 4 divisors (see below), whose sum is σ = 11777244864. Its totient is φ = 11041167000.

The previous prime is 11409205901. The next prime is 11409205933. The reversal of 11409205931 is 13950290411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13950290411 = 929 ⋅15016459.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11409205931 is a prime.

It is a super-2 number, since 2×11409205931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11409205891 and 11409205900.

It is not an unprimeable number, because it can be changed into a prime (11409205933) 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, 184019420 + ... + 184019481.

It is an arithmetic number, because the mean of its divisors is an integer number (2944311216).

Almost surely, 2^11409205931 is an apocalyptic number.

11409205931 is a deficient number, since it is larger than the sum of its proper divisors (368038933).

11409205931 is an equidigital number, since it uses as much as digits as its factorization.

11409205931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368038932.

The product of its (nonzero) digits is 9720, while the sum is 35.

The spelling of 11409205931 in words is "eleven billion, four hundred nine million, two hundred five thousand, nine hundred thirty-one".