20105350399 has 2 divisors, whose sum is σ = 20105350400. Its totient is φ = 20105350398.

The previous prime is 20105350393. The next prime is 20105350547. The reversal of 20105350399 is 99305350102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20105350399 - 2¹³ = 20105342207 is a prime.

It is a super-2 number, since 2×20105350399² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20105350393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10052675199 + 10052675200.

It is an arithmetic number, because the mean of its divisors is an integer number (10052675200).

Almost surely, 2^20105350399 is an apocalyptic number.

20105350399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20105350399 is an equidigital number, since it uses as much as digits as its factorization.

20105350399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36450, while the sum is 37.

The spelling of 20105350399 in words is "twenty billion, one hundred five million, three hundred fifty thousand, three hundred ninety-nine".