20004199123 has 2 divisors, whose sum is σ = 20004199124. Its totient is φ = 20004199122.

The previous prime is 20004199121. The next prime is 20004199139. The reversal of 20004199123 is 32199140002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20004199123 - 2¹ = 20004199121 is a prime.

Together with 20004199121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20004199121) 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, 10002099561 + 10002099562.

It is an arithmetic number, because the mean of its divisors is an integer number (10002099562).

Almost surely, 2^20004199123 is an apocalyptic number.

20004199123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20004199123 is an equidigital number, since it uses as much as digits as its factorization.

20004199123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 20004199123 in words is "twenty billion, four million, one hundred ninety-nine thousand, one hundred twenty-three".