23912020 has 72 divisors (see below), whose sum is σ = 56776104. Its totient is φ = 8448000.

The previous prime is 23912003. The next prime is 23912029. The reversal of 23912020 is 2021932.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 698896 + 23213124 = 836^2 + 4818^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23912029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99100 + ... + 99340.

It is an arithmetic number, because the mean of its divisors is an integer number (788557).

Almost surely, 2^23912020 is an apocalyptic number.

23912020 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 23912020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28388052).

23912020 is an abundant number, since it is smaller than the sum of its proper divisors (32864084).

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

23912020 is a wasteful number, since it uses less digits than its factorization.

23912020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 23912020 is about 4889.9918200341. The cubic root of 23912020 is about 288.0970127137.

Adding to 23912020 its reverse (2021932), we get a palindrome (25933952).

The spelling of 23912020 in words is "twenty-three million, nine hundred twelve thousand, twenty".