19906793 has 2 divisors, whose sum is σ = 19906794. Its totient is φ = 19906792.

The previous prime is 19906781. The next prime is 19906811. The reversal of 19906793 is 39760991.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13162384 + 6744409 = 3628^2 + 2597^2 .

It is an emirp because it is prime and its reverse (39760991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19906793 - 2¹⁶ = 19841257 is a prime.

It is not a weakly prime, because it can be changed into another prime (19906723) by changing a digit.

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, 9953396 + 9953397.

It is an arithmetic number, because the mean of its divisors is an integer number (9953397).

Almost surely, 2^19906793 is an apocalyptic number.

It is an amenable number.

19906793 is a deficient number, since it is larger than the sum of its proper divisors (1).

19906793 is an equidigital number, since it uses as much as digits as its factorization.

19906793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 19906793 is about 4461.7029260138. The cubic root of 19906793 is about 271.0194337085.

The spelling of 19906793 in words is "nineteen million, nine hundred six thousand, seven hundred ninety-three".