1320000019993 has 4 divisors (see below), whose sum is σ = 1320002397540. Its totient is φ = 1319997642448.

The previous prime is 1320000019937. The next prime is 1320000020021. The reversal of 1320000019993 is 3999100000231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 725208934464 + 594791085529 = 851592^2 + 771227^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320000019993 - 2¹³ = 1320000011801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320000019913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136503 + ... + 1630531.

It is an arithmetic number, because the mean of its divisors is an integer number (330000599385).

Almost surely, 2^{1320000019993} is an apocalyptic number.

It is an amenable number.

1320000019993 is a deficient number, since it is larger than the sum of its proper divisors (2377547).

1320000019993 is an equidigital number, since it uses as much as digits as its factorization.

1320000019993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377546.

The product of its (nonzero) digits is 13122, while the sum is 37.

The spelling of 1320000019993 in words is "one trillion, three hundred twenty billion, nineteen thousand, nine hundred ninety-three".