11921423516 has 12 divisors (see below), whose sum is σ = 20863263288. Its totient is φ = 5960491152.

The previous prime is 11921423509. The next prime is 11921423539. The reversal of 11921423516 is 61532412911.

11921423516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 157775 + ... + 220761.

It is an arithmetic number, because the mean of its divisors is an integer number (1738605274).

Almost surely, 2^11921423516 is an apocalyptic number.

It is an amenable number.

11921423516 is a deficient number, since it is larger than the sum of its proper divisors (8941839772).

11921423516 is a wasteful number, since it uses less digits than its factorization.

11921423516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110308 (or 110306 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The spelling of 11921423516 in words is "eleven billion, nine hundred twenty-one million, four hundred twenty-three thousand, five hundred sixteen".