1820404016 has 20 divisors (see below), whose sum is σ = 3528510024. Its totient is φ = 909820800.

The previous prime is 1820403997. The next prime is 1820404039. The reversal of 1820404016 is 6104040281.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17771 + ... + 62901.

Almost surely, 2^1820404016 is an apocalyptic number.

1820404016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1820404016 is a deficient number, since it is larger than the sum of its proper divisors (1708106008).

1820404016 is a wasteful number, since it uses less digits than its factorization.

1820404016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47660 (or 47654 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1820404016 is about 42666.1928932029. The cubic root of 1820404016 is about 1221.0194864530.

Adding to 1820404016 its reverse (6104040281), we get a palindrome (7924444297).

The spelling of 1820404016 in words is "one billion, eight hundred twenty million, four hundred four thousand, sixteen".