6821834738 has 4 divisors (see below), whose sum is σ = 10232752110. Its totient is φ = 3410917368.

The previous prime is 6821834731. The next prime is 6821834759. The reversal of 6821834738 is 8374381286.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5297947369 + 1523887369 = 72787^2 + 39037^2 .

It is not an unprimeable number, because it can be changed into a prime (6821834731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1705458683 + ... + 1705458686.

Almost surely, 2^6821834738 is an apocalyptic number.

6821834738 is a deficient number, since it is larger than the sum of its proper divisors (3410917372).

6821834738 is a wasteful number, since it uses less digits than its factorization.

6821834738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410917371.

The product of its digits is 1548288, while the sum is 50.

The square root of 6821834738 is about 82594.3989505342. The cubic root of 6821834738 is about 1896.5620876230.

The spelling of 6821834738 in words is "six billion, eight hundred twenty-one million, eight hundred thirty-four thousand, seven hundred thirty-eight".