20123030344243 has 8 divisors (see below), whose sum is σ = 20147374252512. Its totient is φ = 20098689623616.

The previous prime is 20123030344127. The next prime is 20123030344267. The reversal of 20123030344243 is 34244303032102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123030344243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20123030344343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11959746 + ... + 13538152.

It is an arithmetic number, because the mean of its divisors is an integer number (2518421781564).

Almost surely, 2^{20123030344243} is an apocalyptic number.

20123030344243 is a deficient number, since it is larger than the sum of its proper divisors (24343908269).

20123030344243 is a wasteful number, since it uses less digits than its factorization.

20123030344243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593821.

The product of its (nonzero) digits is 41472, while the sum is 31.

Adding to 20123030344243 its reverse (34244303032102), we get a palindrome (54367333376345).

The spelling of 20123030344243 in words is "twenty trillion, one hundred twenty-three billion, thirty million, three hundred forty-four thousand, two hundred forty-three".