123310020 has 48 divisors (see below), whose sum is σ = 345921408. Its totient is φ = 32820480.

The previous prime is 123310013. The next prime is 123310021. The reversal of 123310020 is 20013321.

It is a happy number.

It is a super-2 number, since 2×123310020² = 30410722064800800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 123309978 and 123310005.

It is not an unprimeable number, because it can be changed into a prime (123310021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36232 + ... + 39488.

It is an arithmetic number, because the mean of its divisors is an integer number (7206696).

Almost surely, 2^123310020 is an apocalyptic number.

123310020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123310020 is an abundant number, since it is smaller than the sum of its proper divisors (222611388).

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

123310020 is a wasteful number, since it uses less digits than its factorization.

123310020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3900 (or 3898 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 123310020 is about 11104.5044914215. The cubic root of 123310020 is about 497.7364615843.

Adding to 123310020 its reverse (20013321), we get a palindrome (143323341).

The spelling of 123310020 in words is "one hundred twenty-three million, three hundred ten thousand, twenty".