20210340123 has 24 divisors (see below), whose sum is σ = 29406282048. Its totient is φ = 13375297152.

The previous prime is 20210340121. The next prime is 20210340127. The reversal of 20210340123 is 32104301202.

20210340123 is a `hidden beast` number, since 202 + 1 + 0 + 340 + 123 = 666.

It is not a de Polignac number, because 20210340123 - 2¹ = 20210340121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20210340096 and 20210340105.

It is not an unprimeable number, because it can be changed into a prime (20210340121) 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, 797790 + ... + 822732.

It is an arithmetic number, because the mean of its divisors is an integer number (1225261752).

Almost surely, 2^20210340123 is an apocalyptic number.

20210340123 is a deficient number, since it is larger than the sum of its proper divisors (9195941925).

20210340123 is a wasteful number, since it uses less digits than its factorization.

20210340123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25603 (or 25600 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20210340123 its reverse (32104301202), we get a palindrome (52314641325).

The spelling of 20210340123 in words is "twenty billion, two hundred ten million, three hundred forty thousand, one hundred twenty-three".