1920418645720 has 32 divisors (see below), whose sum is σ = 4352027878800. Its totient is φ = 762641071488.

The previous prime is 1920418645637. The next prime is 1920418645721. The reversal of 1920418645720 is 275468140291.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1920418645721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172693959 + ... + 172705078.

Almost surely, 2^{1920418645720} is an apocalyptic number.

1920418645720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1920418645720 is an abundant number, since it is smaller than the sum of its proper divisors (2431609233080).

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

1920418645720 is a wasteful number, since it uses less digits than its factorization.

1920418645720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345399187 (or 345399183 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 1920418645720 in words is "one trillion, nine hundred twenty billion, four hundred eighteen million, six hundred forty-five thousand, seven hundred twenty".