1921854968 has 16 divisors (see below), whose sum is σ = 3931067160. Its totient is φ = 873570400.

The previous prime is 1921854877. The next prime is 1921854983. The reversal of 1921854968 is 8694581291.

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, 10919543 + ... + 10919718.

Almost surely, 2^1921854968 is an apocalyptic number.

It is an amenable number.

1921854968 is an abundant number, since it is smaller than the sum of its proper divisors (2009212192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1921854968 is a wasteful number, since it uses less digits than its factorization.

1921854968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21839278 (or 21839274 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 53.

The square root of 1921854968 is about 43838.9663199305. The cubic root of 1921854968 is about 1243.2931386083.

The spelling of 1921854968 in words is "one billion, nine hundred twenty-one million, eight hundred fifty-four thousand, nine hundred sixty-eight".