1720030721103 has 6 divisors (see below), whose sum is σ = 2484488819384. Its totient is φ = 1146687147396.

The previous prime is 1720030721099. The next prime is 1720030721137. The reversal of 1720030721103 is 3011270300271.

It is not a de Polignac number, because 1720030721103 - 2² = 1720030721099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720030721803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95557262275 + ... + 95557262292.

Almost surely, 2^{1720030721103} is an apocalyptic number.

1720030721103 is a deficient number, since it is larger than the sum of its proper divisors (764458098281).

1720030721103 is a wasteful number, since it uses less digits than its factorization.

1720030721103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191114524573 (or 191114524570 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The spelling of 1720030721103 in words is "one trillion, seven hundred twenty billion, thirty million, seven hundred twenty-one thousand, one hundred three".