16720216523423 has 16 divisors (see below), whose sum is σ = 20277597058560. Its totient is φ = 13476153029856.

The previous prime is 16720216523419. The next prime is 16720216523431. The reversal of 16720216523423 is 32432561202761.

It is a cyclic number.

It is not a de Polignac number, because 16720216523423 - 2² = 16720216523419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16720216523723) 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, 880094540 + ... + 880113537.

It is an arithmetic number, because the mean of its divisors is an integer number (1267349816160).

Almost surely, 2^{16720216523423} is an apocalyptic number.

16720216523423 is a deficient number, since it is larger than the sum of its proper divisors (3557380535137).

16720216523423 is a wasteful number, since it uses less digits than its factorization.

16720216523423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760208166.

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 16720216523423 in words is "sixteen trillion, seven hundred twenty billion, two hundred sixteen million, five hundred twenty-three thousand, four hundred twenty-three".