1999113210 has 60 divisors (see below), whose sum is σ = 5378817114. Its totient is φ = 532757520.

The previous prime is 1999113209. The next prime is 1999113217. The reversal of 1999113210 is 123119991.

It can be written as a sum of positive squares in only one way, i.e., 1799201889 + 199911321 = 42417^2 + 14139^2 .

It is not an unprimeable number, because it can be changed into a prime (1999113217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1271725 + ... + 1273295.

Almost surely, 2^1999113210 is an apocalyptic number.

1999113210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1999113210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2689408557).

1999113210 is an abundant number, since it is smaller than the sum of its proper divisors (3379703904).

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

1999113210 is an frugal number, since it uses more digits than its factorization.

1999113210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 36.

The square root of 1999113210 is about 44711.4438371207. The cubic root of 1999113210 is about 1259.7348081346.

The spelling of 1999113210 in words is "one billion, nine hundred ninety-nine million, one hundred thirteen thousand, two hundred ten".