20443312342123 has 12 divisors (see below), whose sum is σ = 22476978517840. Its totient is φ = 18579676571280.

The previous prime is 20443312342099. The next prime is 20443312342157. The reversal of 20443312342123 is 32124321334402.

It is not a de Polignac number, because 20443312342123 - 2⁹ = 20443312341611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20443312342183) 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, 22983708 + ... + 23856601.

Almost surely, 2^{20443312342123} is an apocalyptic number.

20443312342123 is a deficient number, since it is larger than the sum of its proper divisors (2033666175717).

20443312342123 is a wasteful number, since it uses less digits than its factorization.

20443312342123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46843938 (or 46843927 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 20443312342123 its reverse (32124321334402), we get a palindrome (52567633676525).

The spelling of 20443312342123 in words is "twenty trillion, four hundred forty-three billion, three hundred twelve million, three hundred forty-two thousand, one hundred twenty-three".