1921430050 has 24 divisors (see below), whose sum is σ = 3576445200. Its totient is φ = 768016080.

The previous prime is 1921430039. The next prime is 1921430053. The reversal of 1921430050 is 500341291.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a junction number, because it is equal to n+sod(n) for n = 1921429997 and 1921430024.

It is not an unprimeable number, because it can be changed into a prime (1921430053) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 59781 + ... + 86119.

It is an arithmetic number, because the mean of its divisors is an integer number (149018550).

Almost surely, 2^1921430050 is an apocalyptic number.

1921430050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1921430050 is a deficient number, since it is larger than the sum of its proper divisors (1655015150).

1921430050 is a wasteful number, since it uses less digits than its factorization.

1921430050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27810 (or 27805 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1921430050 is about 43834.1197014381. The cubic root of 1921430050 is about 1243.2015020415.

The spelling of 1921430050 in words is "one billion, nine hundred twenty-one million, four hundred thirty thousand, fifty".