20836633871 has 2 divisors, whose sum is σ = 20836633872. Its totient is φ = 20836633870.

The previous prime is 20836633843. The next prime is 20836633889. The reversal of 20836633871 is 17833663802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20836633871 - 2¹⁸ = 20836371727 is a prime.

It is a super-2 number, since 2×20836633871² (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 (20836633891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10418316935 + 10418316936.

It is an arithmetic number, because the mean of its divisors is an integer number (10418316936).

Almost surely, 2^20836633871 is an apocalyptic number.

20836633871 is a deficient number, since it is larger than the sum of its proper divisors (1).

20836633871 is an equidigital number, since it uses as much as digits as its factorization.

20836633871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 20836633871 in words is "twenty billion, eight hundred thirty-six million, six hundred thirty-three thousand, eight hundred seventy-one".