20199622439 has 2 divisors, whose sum is σ = 20199622440. Its totient is φ = 20199622438.

The previous prime is 20199622427. The next prime is 20199622453. The reversal of 20199622439 is 93422699102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20199622439 - 2¹⁶ = 20199556903 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20199622393 and 20199622402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20199622409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10099811219 + 10099811220.

It is an arithmetic number, because the mean of its divisors is an integer number (10099811220).

Almost surely, 2^20199622439 is an apocalyptic number.

20199622439 is a deficient number, since it is larger than the sum of its proper divisors (1).

20199622439 is an equidigital number, since it uses as much as digits as its factorization.

20199622439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 20199622439 in words is "twenty billion, one hundred ninety-nine million, six hundred twenty-two thousand, four hundred thirty-nine".