1720210206742 has 4 divisors (see below), whose sum is σ = 2580315310116. Its totient is φ = 860105103370.

The previous prime is 1720210206733. The next prime is 1720210206779. The reversal of 1720210206742 is 2476020120271.

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

It is a junction number, because it is equal to n+sod(n) for n = 1720210206698 and 1720210206707.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430052551684 + ... + 430052551687.

It is an arithmetic number, because the mean of its divisors is an integer number (645078827529).

Almost surely, 2^{1720210206742} is an apocalyptic number.

1720210206742 is a deficient number, since it is larger than the sum of its proper divisors (860105103374).

1720210206742 is an equidigital number, since it uses as much as digits as its factorization.

1720210206742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860105103373.

The product of its (nonzero) digits is 18816, while the sum is 34.

The spelling of 1720210206742 in words is "one trillion, seven hundred twenty billion, two hundred ten million, two hundred six thousand, seven hundred forty-two".