20123123103 has 12 divisors (see below), whose sum is σ = 29071158168. Its totient is φ = 13413373200.

The previous prime is 20123123089. The next prime is 20123123129. The reversal of 20123123103 is 30132132102.

20123123103 is a `hidden beast` number, since 201 + 231 + 231 + 0 + 3 = 666.

It is not a de Polignac number, because 20123123103 - 2⁴ = 20123123087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123123183) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106525 + ... + 227142.

It is an arithmetic number, because the mean of its divisors is an integer number (2422596514).

Almost surely, 2^20123123103 is an apocalyptic number.

20123123103 is a deficient number, since it is larger than the sum of its proper divisors (8948035065).

20123123103 is a wasteful number, since it uses less digits than its factorization.

20123123103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340374 (or 340371 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20123123103 its reverse (30132132102), we get a palindrome (50255255205).

The spelling of 20123123103 in words is "twenty billion, one hundred twenty-three million, one hundred twenty-three thousand, one hundred three".