1921961336 has 8 divisors (see below), whose sum is σ = 3603677520. Its totient is φ = 960980664.

The previous prime is 1921961323. The next prime is 1921961381. The reversal of 1921961336 is 6331691291.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1921961293 and 1921961302.

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 as a sum of consecutive naturals, namely, 120122576 + ... + 120122591.

It is an arithmetic number, because the mean of its divisors is an integer number (450459690).

Almost surely, 2^1921961336 is an apocalyptic number.

It is an amenable number.

1921961336 is a deficient number, since it is larger than the sum of its proper divisors (1681716184).

1921961336 is a wasteful number, since it uses less digits than its factorization.

1921961336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240245173 (or 240245169 counting only the distinct ones).

The product of its digits is 52488, while the sum is 41.

The square root of 1921961336 is about 43840.1794704356. The cubic root of 1921961336 is about 1243.3160755047.

The spelling of 1921961336 in words is "one billion, nine hundred twenty-one million, nine hundred sixty-one thousand, three hundred thirty-six".