1921134372 has 12 divisors (see below), whose sum is σ = 4482646896. Its totient is φ = 640378120.

The previous prime is 1921134343. The next prime is 1921134421. The reversal of 1921134372 is 2734311291.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 80047254 + ... + 80047277.

It is an arithmetic number, because the mean of its divisors is an integer number (373553908).

Almost surely, 2^1921134372 is an apocalyptic number.

1921134372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1921134372 is an abundant number, since it is smaller than the sum of its proper divisors (2561512524).

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

1921134372 is a wasteful number, since it uses less digits than its factorization.

1921134372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160094538 (or 160094536 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 1921134372 is about 43830.7468793312. The cubic root of 1921134372 is about 1243.1377290215.

The spelling of 1921134372 in words is "one billion, nine hundred twenty-one million, one hundred thirty-four thousand, three hundred seventy-two".