1921380050 has 18 divisors (see below), whose sum is σ = 3574343493. Its totient is φ = 768428040.

The previous prime is 1921380029. The next prime is 1921380053. The reversal of 1921380050 is 500831291.

It can be written as a sum of positive squares in 2 ways, for example, as 1882952449 + 38427601 = 43393^2 + 6199^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=30995.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1921379995 and 1921380022.

It is not an unprimeable number, because it can be changed into a prime (1921380053) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 306851 + ... + 313049.

Almost surely, 2^1921380050 is an apocalyptic number.

1921380050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1921380050 is a deficient number, since it is larger than the sum of its proper divisors (1652963443).

1921380050 is an frugal number, since it uses more digits than its factorization.

1921380050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12410 (or 6206 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1921380050 is about 43833.5493657541. The cubic root of 1921380050 is about 1243.1907183001.

The spelling of 1921380050 in words is "one billion, nine hundred twenty-one million, three hundred eighty thousand, fifty".