1720343740031 has 16 divisors (see below), whose sum is σ = 2006343782400. Its totient is φ = 1474498017720.

The previous prime is 1720343739931. The next prime is 1720343740069. The reversal of 1720343740031 is 1300473430271.

It is not a de Polignac number, because 1720343740031 - 2¹⁰ = 1720343739007 is a prime.

It is a super-2 number, since 2×1720343740031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1720343739973 and 1720343740000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720343749031) 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 15 ways as a sum of consecutive naturals, for example, 6465830 + ... + 6726636.

It is an arithmetic number, because the mean of its divisors is an integer number (125396486400).

Almost surely, 2^{1720343740031} is an apocalyptic number.

1720343740031 is a deficient number, since it is larger than the sum of its proper divisors (286000042369).

1720343740031 is an equidigital number, since it uses as much as digits as its factorization.

1720343740031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280059 (or 280045 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 35.

The spelling of 1720343740031 in words is "one trillion, seven hundred twenty billion, three hundred forty-three million, seven hundred forty thousand, thirty-one".