1920747488890 has 16 divisors (see below), whose sum is σ = 3458065996800. Its totient is φ = 768138880720.

The previous prime is 1920747488867. The next prime is 1920747488909. The reversal of 1920747488890 is 988847470291.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19963966 + ... + 20059945.

It is an arithmetic number, because the mean of its divisors is an integer number (216129124800).

Almost surely, 2^{1920747488890} is an apocalyptic number.

1920747488890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1920747488890 is a deficient number, since it is larger than the sum of its proper divisors (1537318507910).

1920747488890 is a wasteful number, since it uses less digits than its factorization.

1920747488890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40028717.

The product of its (nonzero) digits is 65028096, while the sum is 67.

The spelling of 1920747488890 in words is "one trillion, nine hundred twenty billion, seven hundred forty-seven million, four hundred eighty-eight thousand, eight hundred ninety".