20550123 has 24 divisors (see below), whose sum is σ = 32550336. Its totient is φ = 12390000.

The previous prime is 20550121. The next prime is 20550199. The reversal of 20550123 is 32105502.

It is a happy number.

It is not a de Polignac number, because 20550123 - 2¹ = 20550121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20550096 and 20550105.

It is not an unprimeable number, because it can be changed into a prime (20550121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24436 + ... + 25262.

It is an arithmetic number, because the mean of its divisors is an integer number (1356264).

Almost surely, 2^20550123 is an apocalyptic number.

20550123 is a deficient number, since it is larger than the sum of its proper divisors (12000213).

20550123 is a wasteful number, since it uses less digits than its factorization.

20550123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095 (or 1092 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 20550123 is about 4533.2243491802. The cubic root of 20550123 is about 273.9080578441.

Adding to 20550123 its reverse (32105502), we get a palindrome (52655625).

The spelling of 20550123 in words is "twenty million, five hundred fifty thousand, one hundred twenty-three".