1909200012 has 12 divisors (see below), whose sum is σ = 4454800056. Its totient is φ = 636400000.

The previous prime is 1909200001. The next prime is 1909200053. The reversal of 1909200012 is 2100029091.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79549989 + ... + 79550012.

It is an arithmetic number, because the mean of its divisors is an integer number (371233338).

Almost surely, 2^1909200012 is an apocalyptic number.

1909200012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1909200012 is an abundant number, since it is smaller than the sum of its proper divisors (2545600044).

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

1909200012 is a wasteful number, since it uses less digits than its factorization.

1909200012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159100008 (or 159100006 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 1909200012 is about 43694.3933703170. The cubic root of 1909200012 is about 1240.5581973492.

The spelling of 1909200012 in words is "one billion, nine hundred nine million, two hundred thousand, twelve".