23210020 has 48 divisors (see below), whose sum is σ = 51891840. Its totient is φ = 8695296.

The previous prime is 23210017. The next prime is 23210021. The reversal of 23210020 is 2001232.

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 = 23209979 and 23210006.

It is not an unprimeable number, because it can be changed into a prime (23210021) 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, 38844 + ... + 39436.

It is an arithmetic number, because the mean of its divisors is an integer number (1081080).

Almost surely, 2^23210020 is an apocalyptic number.

23210020 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 23210020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25945920).

23210020 is an abundant number, since it is smaller than the sum of its proper divisors (28681820).

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

23210020 is a wasteful number, since it uses less digits than its factorization.

23210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724 (or 722 counting only the distinct ones).

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

The square root of 23210020 is about 4817.6778638676. The cubic root of 23210020 is about 285.2496837265.

Adding to 23210020 its reverse (2001232), we get a palindrome (25211252).

The spelling of 23210020 in words is "twenty-three million, two hundred ten thousand, twenty".