123532020 has 96 divisors (see below), whose sum is σ = 388227840. Its totient is φ = 32607360.

The previous prime is 123532009. The next prime is 123532037. The reversal of 123532020 is 20235321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 123531984 and 123532002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54510 + ... + 56730.

It is an arithmetic number, because the mean of its divisors is an integer number (4044040).

Almost surely, 2^123532020 is an apocalyptic number.

123532020 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 123532020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194113920).

123532020 is an abundant number, since it is smaller than the sum of its proper divisors (264695820).

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

123532020 is a wasteful number, since it uses less digits than its factorization.

123532020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342 (or 2334 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 123532020 is about 11114.4959399876. The cubic root of 123532020 is about 498.0349808495.

Adding to 123532020 its reverse (20235321), we get a palindrome (143767341).

The spelling of 123532020 in words is "one hundred twenty-three million, five hundred thirty-two thousand, twenty".