1821827836 has 6 divisors (see below), whose sum is σ = 3188198720. Its totient is φ = 910913916.

The previous prime is 1821827803. The next prime is 1821827849. The reversal of 1821827836 is 6387281281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227728476 + ... + 227728483.

Almost surely, 2^1821827836 is an apocalyptic number.

It is an amenable number.

1821827836 is a deficient number, since it is larger than the sum of its proper divisors (1366370884).

1821827836 is a wasteful number, since it uses less digits than its factorization.

1821827836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455456963 (or 455456961 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 1821827836 is about 42682.8752077458. The cubic root of 1821827836 is about 1221.3377416115.

The spelling of 1821827836 in words is "one billion, eight hundred twenty-one million, eight hundred twenty-seven thousand, eight hundred thirty-six".