20004356634123 has 4 divisors (see below), whose sum is σ = 26672475512168. Its totient is φ = 13336237756080.

The previous prime is 20004356634113. The next prime is 20004356634137. The reversal of 20004356634123 is 32143665340002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20004356634123 - 2²⁵ = 20004323079691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20004356634113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3334059439018 + ... + 3334059439023.

It is an arithmetic number, because the mean of its divisors is an integer number (6668118878042).

Almost surely, 2^{20004356634123} is an apocalyptic number.

20004356634123 is a deficient number, since it is larger than the sum of its proper divisors (6668118878045).

20004356634123 is an equidigital number, since it uses as much as digits as its factorization.

20004356634123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668118878044.

The product of its (nonzero) digits is 311040, while the sum is 39.

The spelling of 20004356634123 in words is "twenty trillion, four billion, three hundred fifty-six million, six hundred thirty-four thousand, one hundred twenty-three".