20123022423 has 12 divisors (see below), whose sum is σ = 31211218680. Its totient is φ = 11498869872.

The previous prime is 20123022419. The next prime is 20123022431. The reversal of 20123022423 is 32422032102.

It is not a de Polignac number, because 20123022423 - 2² = 20123022419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20123022423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123022463) 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, 68445508 + ... + 68445801.

It is an arithmetic number, because the mean of its divisors is an integer number (2600934890).

Almost surely, 2^20123022423 is an apocalyptic number.

20123022423 is a deficient number, since it is larger than the sum of its proper divisors (11088196257).

20123022423 is a wasteful number, since it uses less digits than its factorization.

20123022423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136891326 (or 136891319 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20123022423 its reverse (32422032102), we get a palindrome (52545054525).

The spelling of 20123022423 in words is "twenty billion, one hundred twenty-three million, twenty-two thousand, four hundred twenty-three".