1921317240308 has 12 divisors (see below), whose sum is σ = 3362319297792. Its totient is φ = 960654583800.

The previous prime is 1921317240287. The next prime is 1921317240317. The reversal of 1921317240308 is 8030427131291.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231341 + ... + 1973867.

It is an arithmetic number, because the mean of its divisors is an integer number (280193274816).

Almost surely, 2^{1921317240308} is an apocalyptic number.

It is an amenable number.

1921317240308 is a deficient number, since it is larger than the sum of its proper divisors (1441002057484).

1921317240308 is a wasteful number, since it uses less digits than its factorization.

1921317240308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018182 (or 2018180 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 1921317240308 in words is "one trillion, nine hundred twenty-one billion, three hundred seventeen million, two hundred forty thousand, three hundred eight".