1921675320 has 64 divisors (see below), whose sum is σ = 6405588000. Its totient is φ = 512446464.

The previous prime is 1921675319. The next prime is 1921675339. The reversal of 1921675320 is 235761291.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 888585 + ... + 890744.

Almost surely, 2^1921675320 is an apocalyptic number.

1921675320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1921675320 is an abundant number, since it is smaller than the sum of its proper divisors (4483912680).

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

1921675320 is a wasteful number, since it uses less digits than its factorization.

1921675320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779349 (or 1779339 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1921675320 is about 43836.9173186254. The cubic root of 1921675320 is about 1243.2543978970.

The spelling of 1921675320 in words is "one billion, nine hundred twenty-one million, six hundred seventy-five thousand, three hundred twenty".