20123161422 has 128 divisors (see below), whose sum is σ = 51753461760. Its totient is φ = 5073062400.

The previous prime is 20123161411. The next prime is 20123161427. The reversal of 20123161422 is 22416132102.

It is a junction number, because it is equal to n+sod(n) for n = 20123161392 and 20123161401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123161427) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1592943 + ... + 1605525.

It is an arithmetic number, because the mean of its divisors is an integer number (404323920).

Almost surely, 2^20123161422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20123161422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25876730880).

20123161422 is an abundant number, since it is smaller than the sum of its proper divisors (31630300338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123161422 is a wasteful number, since it uses less digits than its factorization.

20123161422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12738.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 20123161422 its reverse (22416132102), we get a palindrome (42539293524).

The spelling of 20123161422 in words is "twenty billion, one hundred twenty-three million, one hundred sixty-one thousand, four hundred twenty-two".