11921920743 has 8 divisors (see below), whose sum is σ = 15901820928. Its totient is φ = 7944983864.

The previous prime is 11921920741. The next prime is 11921920771. The reversal of 11921920743 is 34702912911.

11921920743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11921920743 - 2¹ = 11921920741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11921920741) 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 7 ways as a sum of consecutive naturals, for example, 731421 + ... + 747542.

It is an arithmetic number, because the mean of its divisors is an integer number (1987727616).

Almost surely, 2^11921920743 is an apocalyptic number.

11921920743 is a deficient number, since it is larger than the sum of its proper divisors (3979900185).

11921920743 is a wasteful number, since it uses less digits than its factorization.

11921920743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481653.

The product of its (nonzero) digits is 27216, while the sum is 39.

The spelling of 11921920743 in words is "eleven billion, nine hundred twenty-one million, nine hundred twenty thousand, seven hundred forty-three".