1920000109281 has 8 divisors (see below), whose sum is σ = 2560886890944. Its totient is φ = 1279556700240.

The previous prime is 1920000109277. The next prime is 1920000109301. The reversal of 1920000109281 is 1829010000291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1920000109281 - 2² = 1920000109277 is a prime.

It is a super-4 number, since 4×1920000109281⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1920000109241) 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, 110833050 + ... + 110850371.

It is an arithmetic number, because the mean of its divisors is an integer number (320110861368).

Almost surely, 2^{1920000109281} is an apocalyptic number.

It is an amenable number.

1920000109281 is a deficient number, since it is larger than the sum of its proper divisors (640886781663).

1920000109281 is a wasteful number, since it uses less digits than its factorization.

1920000109281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221686311.

The product of its (nonzero) digits is 2592, while the sum is 33.

The spelling of 1920000109281 in words is "one trillion, nine hundred twenty billion, one hundred nine thousand, two hundred eighty-one".