11822720831 has 4 divisors (see below), whose sum is σ = 11856213312. Its totient is φ = 11789228352.

The previous prime is 11822720827. The next prime is 11822720837. The reversal of 11822720831 is 13802722811.

11822720831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11822720831 - 2² = 11822720827 is a prime.

It is a super-2 number, since 2×11822720831² (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 = 11822720791 and 11822720800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11822720837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16745711 + ... + 16746416.

It is an arithmetic number, because the mean of its divisors is an integer number (2964053328).

Almost surely, 2^11822720831 is an apocalyptic number.

11822720831 is a deficient number, since it is larger than the sum of its proper divisors (33492481).

11822720831 is an equidigital number, since it uses as much as digits as its factorization.

11822720831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33492480.

The product of its (nonzero) digits is 10752, while the sum is 35.

The spelling of 11822720831 in words is "eleven billion, eight hundred twenty-two million, seven hundred twenty thousand, eight hundred thirty-one".