19922389 has 2 divisors, whose sum is σ = 19922390. Its totient is φ = 19922388.

The previous prime is 19922369. The next prime is 19922411. The reversal of 19922389 is 98322991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12659364 + 7263025 = 3558^2 + 2695^2 .

It is a cyclic number.

It is not a de Polignac number, because 19922389 - 2⁹ = 19921877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19922339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9961194 + 9961195.

It is an arithmetic number, because the mean of its divisors is an integer number (9961195).

Almost surely, 2^19922389 is an apocalyptic number.

It is an amenable number.

19922389 is a deficient number, since it is larger than the sum of its proper divisors (1).

19922389 is an equidigital number, since it uses as much as digits as its factorization.

19922389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 19922389 is about 4463.4503469849. The cubic root of 19922389 is about 271.0901920627.

The spelling of 19922389 in words is "nineteen million, nine hundred twenty-two thousand, three hundred eighty-nine".