16720744093 has 2 divisors, whose sum is σ = 16720744094. Its totient is φ = 16720744092.

The previous prime is 16720744087. The next prime is 16720744141. The reversal of 16720744093 is 39044702761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11756414329 + 4964329764 = 108427^2 + 70458^2 .

It is a cyclic number.

It is not a de Polignac number, because 16720744093 - 2²¹ = 16718646941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16720744003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8360372046 + 8360372047.

It is an arithmetic number, because the mean of its divisors is an integer number (8360372047).

Almost surely, 2^16720744093 is an apocalyptic number.

It is an amenable number.

16720744093 is a deficient number, since it is larger than the sum of its proper divisors (1).

16720744093 is an equidigital number, since it uses as much as digits as its factorization.

16720744093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 16720744093 in words is "sixteen billion, seven hundred twenty million, seven hundred forty-four thousand, ninety-three".