20342043123 has 16 divisors (see below), whose sum is σ = 27207367680. Its totient is φ = 13519076256.

The previous prime is 20342043101. The next prime is 20342043167. The reversal of 20342043123 is 32134024302.

It is not a de Polignac number, because 20342043123 - 2²⁶ = 20274934259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20342043093 and 20342043102.

It is not an unprimeable number, because it can be changed into a prime (20342043173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3996286 + ... + 4001372.

It is an arithmetic number, because the mean of its divisors is an integer number (1700460480).

Almost surely, 2^20342043123 is an apocalyptic number.

20342043123 is a deficient number, since it is larger than the sum of its proper divisors (6865324557).

20342043123 is a wasteful number, since it uses less digits than its factorization.

20342043123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8986.

The product of its (nonzero) digits is 3456, while the sum is 24.

Adding to 20342043123 its reverse (32134024302), we get a palindrome (52476067425).

The spelling of 20342043123 in words is "twenty billion, three hundred forty-two million, forty-three thousand, one hundred twenty-three".