16720333723 has 2 divisors, whose sum is σ = 16720333724. Its totient is φ = 16720333722.

The previous prime is 16720333703. The next prime is 16720333739. The reversal of 16720333723 is 32733302761.

It is a strong prime.

It is an emirp because it is prime and its reverse (32733302761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16720333723 - 2¹⁷ = 16720202651 is a prime.

It is a super-3 number, since 3×16720333723³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (16720333703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8360166861 + 8360166862.

It is an arithmetic number, because the mean of its divisors is an integer number (8360166862).

Almost surely, 2^16720333723 is an apocalyptic number.

16720333723 is a deficient number, since it is larger than the sum of its proper divisors (1).

16720333723 is an equidigital number, since it uses as much as digits as its factorization.

16720333723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 95256, while the sum is 37.

The spelling of 16720333723 in words is "sixteen billion, seven hundred twenty million, three hundred thirty-three thousand, seven hundred twenty-three".