11820277387 has 4 divisors (see below), whose sum is σ = 11895565936. Its totient is φ = 11744988840.

The previous prime is 11820277367. The next prime is 11820277411. The reversal of 11820277387 is 78377202811.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11820277387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11820277367) 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, 37644039 + ... + 37644352.

It is an arithmetic number, because the mean of its divisors is an integer number (2973891484).

Almost surely, 2^11820277387 is an apocalyptic number.

11820277387 is a deficient number, since it is larger than the sum of its proper divisors (75288549).

11820277387 is an equidigital number, since it uses as much as digits as its factorization.

11820277387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75288548.

The product of its (nonzero) digits is 263424, while the sum is 46.

The spelling of 11820277387 in words is "eleven billion, eight hundred twenty million, two hundred seventy-seven thousand, three hundred eighty-seven".