20000000123 has 8 divisors (see below), whose sum is σ = 20199544560. Its totient is φ = 19800689760.

The previous prime is 20000000117. The next prime is 20000000179. The reversal of 20000000123 is 32100000002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20000000123 - 2¹⁴ = 19999983739 is a prime.

It is a Duffinian number.

20000000123 is a modest number, since divided by 123 gives 2 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 20000000123.

It is not an unprimeable number, because it can be changed into a prime (20000000113) 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 7 ways as a sum of consecutive naturals, for example, 115793 + ... + 231101.

It is an arithmetic number, because the mean of its divisors is an integer number (2524943070).

Almost surely, 2^20000000123 is an apocalyptic number.

20000000123 is a deficient number, since it is larger than the sum of its proper divisors (199544437).

20000000123 is a wasteful number, since it uses less digits than its factorization.

20000000123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117037.

The product of its (nonzero) digits is 12, while the sum is 8.

Adding to 20000000123 its reverse (32100000002), we get a palindrome (52100000125).

The spelling of 20000000123 in words is "twenty billion, one hundred twenty-three", and thus it is an aban number.