19924117 has 2 divisors, whose sum is σ = 19924118. Its totient is φ = 19924116.

The previous prime is 19924111. The next prime is 19924127. The reversal of 19924117 is 71142991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12666481 + 7257636 = 3559^2 + 2694^2 .

It is an emirp because it is prime and its reverse (71142991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19924117 - 2¹⁵ = 19891349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19924111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9962058 + 9962059.

It is an arithmetic number, because the mean of its divisors is an integer number (9962059).

Almost surely, 2^19924117 is an apocalyptic number.

It is an amenable number.

19924117 is a deficient number, since it is larger than the sum of its proper divisors (1).

19924117 is an equidigital number, since it uses as much as digits as its factorization.

19924117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 34.

The square root of 19924117 is about 4463.6439150094. The cubic root of 19924117 is about 271.0980296487.

The spelling of 19924117 in words is "nineteen million, nine hundred twenty-four thousand, one hundred seventeen".