20012313123 has 24 divisors (see below), whose sum is σ = 31617817920. Its totient is φ = 12096650160.

The previous prime is 20012313067. The next prime is 20012313131. The reversal of 20012313123 is 32131321002.

It is not a de Polignac number, because 20012313123 - 2⁶ = 20012313059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012313096 and 20012313105.

It is not an unprimeable number, because it can be changed into a prime (20012383123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229161 + ... + 304202.

It is an arithmetic number, because the mean of its divisors is an integer number (1317409080).

Almost surely, 2^20012313123 is an apocalyptic number.

20012313123 is a deficient number, since it is larger than the sum of its proper divisors (11605504797).

20012313123 is a wasteful number, since it uses less digits than its factorization.

20012313123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533759 (or 533756 counting only the distinct ones).

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

Adding to 20012313123 its reverse (32131321002), we get a palindrome (52143634125).

The spelling of 20012313123 in words is "twenty billion, twelve million, three hundred thirteen thousand, one hundred twenty-three".