1820799826 has 32 divisors (see below), whose sum is σ = 2855793600. Its totient is φ = 869944320.

The previous prime is 1820799823. The next prime is 1820799833. The reversal of 1820799826 is 6289970281.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1820799823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1222090 + ... + 1223578.

It is an arithmetic number, because the mean of its divisors is an integer number (89243550).

Almost surely, 2^1820799826 is an apocalyptic number.

1820799826 is a deficient number, since it is larger than the sum of its proper divisors (1034993774).

1820799826 is a wasteful number, since it uses less digits than its factorization.

1820799826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 1820799826 is about 42670.8310910392. The cubic root of 1820799826 is about 1221.1079753627.

The spelling of 1820799826 in words is "one billion, eight hundred twenty million, seven hundred ninety-nine thousand, eight hundred twenty-six".