23020020 has 144 divisors (see below), whose sum is σ = 75479040. Its totient is φ = 5660928.

The previous prime is 23020013. The next prime is 23020051. The reversal of 23020020 is 2002032.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a zygodrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 23019984 and 23020011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 181197 + ... + 181323.

It is an arithmetic number, because the mean of its divisors is an integer number (524160).

Almost surely, 2^23020020 is an apocalyptic number.

23020020 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 23020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37739520).

23020020 is an abundant number, since it is smaller than the sum of its proper divisors (52459020).

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

23020020 is a wasteful number, since it uses less digits than its factorization.

23020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 9.

The square root of 23020020 is about 4797.9182985958. The cubic root of 23020020 is about 284.4691874138.

Adding to 23020020 its reverse (2002032), we get a palindrome (25022052).

The spelling of 23020020 in words is "twenty-three million, twenty thousand, twenty".