1909112020 has 24 divisors (see below), whose sum is σ = 4220143200. Its totient is φ = 723452832.

The previous prime is 1909112011. The next prime is 1909112047. The reversal of 1909112020 is 202119091.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2511610 + ... + 2512369.

It is an arithmetic number, because the mean of its divisors is an integer number (175839300).

Almost surely, 2^1909112020 is an apocalyptic number.

1909112020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1909112020 is an abundant number, since it is smaller than the sum of its proper divisors (2311031180).

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

1909112020 is a wasteful number, since it uses less digits than its factorization.

1909112020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024007 (or 5024005 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 1909112020 is about 43693.3864560759. The cubic root of 1909112020 is about 1240.5391386033.

The spelling of 1909112020 in words is "one billion, nine hundred nine million, one hundred twelve thousand, twenty".