20102105399 has 2 divisors, whose sum is σ = 20102105400. Its totient is φ = 20102105398.

The previous prime is 20102105383. The next prime is 20102105407. The reversal of 20102105399 is 99350120102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20102105399 - 2⁴ = 20102105383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20102105329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051052699 + 10051052700.

It is an arithmetic number, because the mean of its divisors is an integer number (10051052700).

Almost surely, 2^20102105399 is an apocalyptic number.

20102105399 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102105399 is an equidigital number, since it uses as much as digits as its factorization.

20102105399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The spelling of 20102105399 in words is "twenty billion, one hundred two million, one hundred five thousand, three hundred ninety-nine".