11936373821 has 4 divisors (see below), whose sum is σ = 11945678592. Its totient is φ = 11927069052.

The previous prime is 11936373809. The next prime is 11936373833. The reversal of 11936373821 is 12837363911.

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 an interprime number because it is at equal distance from previous prime (11936373809) and next prime (11936373833).

It is a cyclic number.

It is not a de Polignac number, because 11936373821 - 2¹⁰ = 11936372797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11936373521) 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, 4650461 + ... + 4653026.

It is an arithmetic number, because the mean of its divisors is an integer number (2986419648).

Almost surely, 2^11936373821 is an apocalyptic number.

It is an amenable number.

11936373821 is a deficient number, since it is larger than the sum of its proper divisors (9304771).

11936373821 is an equidigital number, since it uses as much as digits as its factorization.

11936373821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9304770.

The product of its digits is 163296, while the sum is 44.

The spelling of 11936373821 in words is "eleven billion, nine hundred thirty-six million, three hundred seventy-three thousand, eight hundred twenty-one".