11814758821 has 4 divisors (see below), whose sum is σ = 12509744652. Its totient is φ = 11119772992.

The previous prime is 11814758783. The next prime is 11814758827. The reversal of 11814758821 is 12885741811.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9669772225 + 2144986596 = 98335^2 + 46314^2 .

It is a cyclic number.

It is not a de Polignac number, because 11814758821 - 2⁹ = 11814758309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11814758827) 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, 347492890 + ... + 347492923.

It is an arithmetic number, because the mean of its divisors is an integer number (3127436163).

Almost surely, 2^11814758821 is an apocalyptic number.

It is an amenable number.

11814758821 is a deficient number, since it is larger than the sum of its proper divisors (694985831).

11814758821 is an equidigital number, since it uses as much as digits as its factorization.

11814758821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694985830.

The product of its digits is 143360, while the sum is 46.

The spelling of 11814758821 in words is "eleven billion, eight hundred fourteen million, seven hundred fifty-eight thousand, eight hundred twenty-one".