11931305854 has 32 divisors (see below), whose sum is σ = 20942530560. Its totient is φ = 5048632800.

The previous prime is 11931305851. The next prime is 11931305879. The reversal of 11931305854 is 45850313911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11931305851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374242 + ... + 404869.

It is an arithmetic number, because the mean of its divisors is an integer number (654454080).

Almost surely, 2^11931305854 is an apocalyptic number.

11931305854 is a deficient number, since it is larger than the sum of its proper divisors (9011224706).

11931305854 is a wasteful number, since it uses less digits than its factorization.

11931305854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779176.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 11931305854 in words is "eleven billion, nine hundred thirty-one million, three hundred five thousand, eight hundred fifty-four".