23021020 has 48 divisors (see below), whose sum is σ = 53071200. Its totient is φ = 8318720.

The previous prime is 23020997. The next prime is 23021029. The reversal of 23021020 is 2012032.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 23020988 and 23021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23021029) 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, 58986 + ... + 59374.

It is an arithmetic number, because the mean of its divisors is an integer number (1105650).

Almost surely, 2^23021020 is an apocalyptic number.

23021020 is a gapful number since it is divisible by the number (20) 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 23021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26535600).

23021020 is an abundant number, since it is smaller than the sum of its proper divisors (30050180).

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

23021020 is a wasteful number, since it uses less digits than its factorization.

23021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 23021020 is about 4798.0225093261. The cubic root of 23021020 is about 284.4733065105.

Adding to 23021020 its reverse (2012032), we get a palindrome (25033052).

The spelling of 23021020 in words is "twenty-three million, twenty-one thousand, twenty".