20402143000123 has 2 divisors, whose sum is σ = 20402143000124. Its totient is φ = 20402143000122.

The previous prime is 20402143000087. The next prime is 20402143000163. The reversal of 20402143000123 is 32100034120402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20402143000123 - 2²⁵ = 20402109445691 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20402143000094 and 20402143000103.

It is not a weakly prime, because it can be changed into another prime (20402143000163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201071500061 + 10201071500062.

It is an arithmetic number, because the mean of its divisors is an integer number (10201071500062).

Almost surely, 2^{20402143000123} is an apocalyptic number.

20402143000123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402143000123 is an equidigital number, since it uses as much as digits as its factorization.

20402143000123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20402143000123 its reverse (32100034120402), we get a palindrome (52502177120525).

The spelling of 20402143000123 in words is "twenty trillion, four hundred two billion, one hundred forty-three million, one hundred twenty-three", and thus it is an aban number.