1921683512 has 16 divisors (see below), whose sum is σ = 4117893360. Its totient is φ = 823578624.

The previous prime is 1921683497. The next prime is 1921683539. The reversal of 1921683512 is 2153861291.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17157833 + ... + 17157944.

It is an arithmetic number, because the mean of its divisors is an integer number (257368335).

Almost surely, 2^1921683512 is an apocalyptic number.

It is an amenable number.

1921683512 is an abundant number, since it is smaller than the sum of its proper divisors (2196209848).

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

1921683512 is a wasteful number, since it uses less digits than its factorization.

1921683512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34315790 (or 34315786 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 1921683512 is about 43837.0107557530. The cubic root of 1921683512 is about 1243.2561645370.

The spelling of 1921683512 in words is "one billion, nine hundred twenty-one million, six hundred eighty-three thousand, five hundred twelve".