1920220110720 has 640 divisors, whose sum is σ = 7353008150400. Its totient is φ = 475819868160.

The previous prime is 1920220110719. The next prime is 1920220110761. The reversal of 1920220110720 is 270110220291.

It is a tau number, because it is divible by the number of its divisors (640).

It is a super-2 number, since 2×1920220110720² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 69607330 + ... + 69634910.

It is an arithmetic number, because the mean of its divisors is an integer number (11489075235).

Almost surely, 2^{1920220110720} is an apocalyptic number.

1920220110720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1920220110720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3676504075200).

1920220110720 is an abundant number, since it is smaller than the sum of its proper divisors (5432788039680).

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

1920220110720 is a wasteful number, since it uses less digits than its factorization.

1920220110720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27708 (or 27687 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The spelling of 1920220110720 in words is "one trillion, nine hundred twenty billion, two hundred twenty million, one hundred ten thousand, seven hundred twenty".