1821840022 has 4 divisors (see below), whose sum is σ = 2732760036. Its totient is φ = 910920010.

The previous prime is 1821840011. The next prime is 1821840067. The reversal of 1821840022 is 2200481281.

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

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, 455460004 + ... + 455460007.

It is an arithmetic number, because the mean of its divisors is an integer number (683190009).

Almost surely, 2^1821840022 is an apocalyptic number.

1821840022 is a deficient number, since it is larger than the sum of its proper divisors (910920014).

1821840022 is an equidigital number, since it uses as much as digits as its factorization.

1821840022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910920013.

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 1821840022 is about 42683.0179579654. The cubic root of 1821840022 is about 1221.3404647353.

The spelling of 1821840022 in words is "one billion, eight hundred twenty-one million, eight hundred forty thousand, twenty-two".