20933842399 has 2 divisors, whose sum is σ = 20933842400. Its totient is φ = 20933842398.

The previous prime is 20933842387. The next prime is 20933842453. The reversal of 20933842399 is 99324833902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20933842399 - 2⁵ = 20933842367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20933842309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10466921199 + 10466921200.

It is an arithmetic number, because the mean of its divisors is an integer number (10466921200).

Almost surely, 2^20933842399 is an apocalyptic number.

20933842399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20933842399 is an equidigital number, since it uses as much as digits as its factorization.

20933842399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2519424, while the sum is 52.

The spelling of 20933842399 in words is "twenty billion, nine hundred thirty-three million, eight hundred forty-two thousand, three hundred ninety-nine".