123030020 has 48 divisors (see below), whose sum is σ = 279417600. Its totient is φ = 45325824.

The previous prime is 123029999. The next prime is 123030029. The reversal of 123030020 is 20030321.

It is a junction number, because it is equal to n+sod(n) for n = 123029983 and 123030010.

It is not an unprimeable number, because it can be changed into a prime (123030029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12131 + ... + 19829.

It is an arithmetic number, because the mean of its divisors is an integer number (5821200).

Almost surely, 2^123030020 is an apocalyptic number.

123030020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123030020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139708800).

123030020 is an abundant number, since it is smaller than the sum of its proper divisors (156387580).

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

123030020 is a wasteful number, since it uses less digits than its factorization.

123030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7772 (or 7770 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 123030020 is about 11091.8898299613. The cubic root of 123030020 is about 497.3594394284.

Adding to 123030020 its reverse (20030321), we get a palindrome (143060341).

The spelling of 123030020 in words is "one hundred twenty-three million, thirty thousand, twenty".