1320225019920 has 800 divisors, whose sum is σ = 4783973306112. Its totient is φ = 337210159104.

The previous prime is 1320225019907. The next prime is 1320225019937. The reversal of 1320225019920 is 299105220231.

1320225019920 is a `hidden beast` number, since 1 + 3 + 20 + 22 + 501 + 99 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 4505887294 + ... + 4505887586.

Almost surely, 2^{1320225019920} is an apocalyptic number.

1320225019920 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 1320225019920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2391986653056).

1320225019920 is an abundant number, since it is smaller than the sum of its proper divisors (3463748286192).

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

1320225019920 is a wasteful number, since it uses less digits than its factorization.

1320225019920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 606 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 1320225019920 in words is "one trillion, three hundred twenty billion, two hundred twenty-five million, nineteen thousand, nine hundred twenty".