1999826814 has 16 divisors (see below), whose sum is σ = 4001617152. Its totient is φ = 666281688.

The previous prime is 1999826813. The next prime is 1999826849. The reversal of 1999826814 is 4186289991.

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, 68404 + ... + 93159.

It is an arithmetic number, because the mean of its divisors is an integer number (250101072).

Almost surely, 2^1999826814 is an apocalyptic number.

1999826814 is an abundant number, since it is smaller than the sum of its proper divisors (2001790338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1999826814 is a wasteful number, since it uses less digits than its factorization.

1999826814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163631.

The product of its digits is 2239488, while the sum is 57.

The square root of 1999826814 is about 44719.4232297332. The cubic root of 1999826814 is about 1259.8846820640.

The spelling of 1999826814 in words is "one billion, nine hundred ninety-nine million, eight hundred twenty-six thousand, eight hundred fourteen".