20605554323 has 2 divisors, whose sum is σ = 20605554324. Its totient is φ = 20605554322.

The previous prime is 20605554311. The next prime is 20605554367. The reversal of 20605554323 is 32345550602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20605554323 - 2¹² = 20605550227 is a prime.

It is not a weakly prime, because it can be changed into another prime (20605554023) 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, 10302777161 + 10302777162.

It is an arithmetic number, because the mean of its divisors is an integer number (10302777162).

Almost surely, 2^20605554323 is an apocalyptic number.

20605554323 is a deficient number, since it is larger than the sum of its proper divisors (1).

20605554323 is an equidigital number, since it uses as much as digits as its factorization.

20605554323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 35.

The spelling of 20605554323 in words is "twenty billion, six hundred five million, five hundred fifty-four thousand, three hundred twenty-three".