1820816924 has 12 divisors (see below), whose sum is σ = 3233988744. Its totient is φ = 896820144.

The previous prime is 1820816923. The next prime is 1820816969. The reversal of 1820816924 is 4296180281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820816923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3396779 + ... + 3397314.

It is an arithmetic number, because the mean of its divisors is an integer number (269499062).

Almost surely, 2^1820816924 is an apocalyptic number.

It is an amenable number.

1820816924 is a deficient number, since it is larger than the sum of its proper divisors (1413171820).

1820816924 is a wasteful number, since it uses less digits than its factorization.

1820816924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6794164 (or 6794162 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 1820816924 is about 42671.0314382017. The cubic root of 1820816924 is about 1221.1117975728. Note that the first 3 decimals are identical.

The spelling of 1820816924 in words is "one billion, eight hundred twenty million, eight hundred sixteen thousand, nine hundred twenty-four".