11338921857 has 4 divisors (see below), whose sum is σ = 15118562480. Its totient is φ = 7559281236.

The previous prime is 11338921849. The next prime is 11338921901. The reversal of 11338921857 is 75812983311.

11338921857 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11338921857 - 2³ = 11338921849 is a prime.

It is a super-2 number, since 2×11338921857² (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 (11338926857) 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, 1889820307 + ... + 1889820312.

It is an arithmetic number, because the mean of its divisors is an integer number (3779640620).

Almost surely, 2^11338921857 is an apocalyptic number.

It is an amenable number.

11338921857 is a deficient number, since it is larger than the sum of its proper divisors (3779640623).

11338921857 is an equidigital number, since it uses as much as digits as its factorization.

11338921857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779640622.

The product of its digits is 362880, while the sum is 48.

The spelling of 11338921857 in words is "eleven billion, three hundred thirty-eight million, nine hundred twenty-one thousand, eight hundred fifty-seven".