1921188291020 has 12 divisors (see below), whose sum is σ = 4034495411184. Its totient is φ = 768475316400.

The previous prime is 1921188291019. The next prime is 1921188291089. The reversal of 1921188291020 is 201928811291.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48029707256 + ... + 48029707295.

It is an arithmetic number, because the mean of its divisors is an integer number (336207950932).

Almost surely, 2^{1921188291020} is an apocalyptic number.

1921188291020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1921188291020 is an abundant number, since it is smaller than the sum of its proper divisors (2113307120164).

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

1921188291020 is a wasteful number, since it uses less digits than its factorization.

1921188291020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96059414560 (or 96059414558 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 44.

The spelling of 1921188291020 in words is "one trillion, nine hundred twenty-one billion, one hundred eighty-eight million, two hundred ninety-one thousand, twenty".