1921333930 has 16 divisors (see below), whose sum is σ = 3459506400. Its totient is φ = 768287952.

The previous prime is 1921333927. The next prime is 1921333933. The reversal of 1921333930 is 393331291.

It is an interprime number because it is at equal distance from previous prime (1921333927) and next prime (1921333933).

It is not an unprimeable number, because it can be changed into a prime (1921333933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4021 + ... + 62119.

It is an arithmetic number, because the mean of its divisors is an integer number (216219150).

Almost surely, 2^1921333930 is an apocalyptic number.

1921333930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1921333930 is a deficient number, since it is larger than the sum of its proper divisors (1538172470).

1921333930 is a wasteful number, since it uses less digits than its factorization.

1921333930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61413.

The product of its (nonzero) digits is 13122, while the sum is 34.

The square root of 1921333930 is about 43833.0232815397. The cubic root of 1921333930 is about 1243.1807712111.

The spelling of 1921333930 in words is "one billion, nine hundred twenty-one million, three hundred thirty-three thousand, nine hundred thirty".