1821418006 has 4 divisors (see below), whose sum is σ = 2732127012. Its totient is φ = 910709002.

The previous prime is 1821417977. The next prime is 1821418009. The reversal of 1821418006 is 6008141281.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821418009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455354500 + ... + 455354503.

It is an arithmetic number, because the mean of its divisors is an integer number (683031753).

Almost surely, 2^1821418006 is an apocalyptic number.

1821418006 is a deficient number, since it is larger than the sum of its proper divisors (910709006).

1821418006 is an equidigital number, since it uses as much as digits as its factorization.

1821418006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910709005.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 1821418006 is about 42678.0740661994. The cubic root of 1821418006 is about 1221.2461525720.

Adding to 1821418006 its reverse (6008141281), we get a palindrome (7829559287).

The spelling of 1821418006 in words is "one billion, eight hundred twenty-one million, four hundred eighteen thousand, six".