123306020 has 24 divisors (see below), whose sum is σ = 259164024. Its totient is φ = 49280256.

The previous prime is 123306011. The next prime is 123306031. The reversal of 123306020 is 20603321.

It can be written as a sum of positive squares in 4 ways, for example, as 11115556 + 112190464 = 3334^2 + 10592^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123306020.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33302 + ... + 36818.

It is an arithmetic number, because the mean of its divisors is an integer number (10798501).

Almost surely, 2^123306020 is an apocalyptic number.

123306020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123306020 is an abundant number, since it is smaller than the sum of its proper divisors (135858004).

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

123306020 is a wasteful number, since it uses less digits than its factorization.

123306020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5279 (or 5277 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 123306020 is about 11104.3243828699. The cubic root of 123306020 is about 497.7310795741.

Adding to 123306020 its reverse (20603321), we get a palindrome (143909341).

The spelling of 123306020 in words is "one hundred twenty-three million, three hundred six thousand, twenty".