1999826812 has 24 divisors (see below), whose sum is σ = 3530482704. Its totient is φ = 991139712.

The previous prime is 1999826789. The next prime is 1999826813. The reversal of 1999826812 is 2186289991.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999826813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428958 + ... + 433594.

It is an arithmetic number, because the mean of its divisors is an integer number (147103446).

Almost surely, 2^1999826812 is an apocalyptic number.

It is an amenable number.

1999826812 is a deficient number, since it is larger than the sum of its proper divisors (1530655892).

1999826812 is a wasteful number, since it uses less digits than its factorization.

1999826812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5565 (or 5563 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 55.

The square root of 1999826812 is about 44719.4232073715. The cubic root of 1999826812 is about 1259.8846816440.

The spelling of 1999826812 in words is "one billion, nine hundred ninety-nine million, eight hundred twenty-six thousand, eight hundred twelve".