20812384123 has 2 divisors, whose sum is σ = 20812384124. Its totient is φ = 20812384122.

The previous prime is 20812384063. The next prime is 20812384189. The reversal of 20812384123 is 32148321802.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20812384123 - 2³³ = 12222449531 is a prime.

It is not a weakly prime, because it can be changed into another prime (20812385123) 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, 10406192061 + 10406192062.

It is an arithmetic number, because the mean of its divisors is an integer number (10406192062).

Almost surely, 2^20812384123 is an apocalyptic number.

20812384123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20812384123 is an equidigital number, since it uses as much as digits as its factorization.

20812384123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 20812384123 in words is "twenty billion, eight hundred twelve million, three hundred eighty-four thousand, one hundred twenty-three".