23533020 has 144 divisors (see below), whose sum is σ = 85962240. Its totient is φ = 5090688.

The previous prime is 23533009. The next prime is 23533043. The reversal of 23533020 is 2033532.

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

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 23532984 and 23533002.

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, 23449 + ... + 24431.

It is an arithmetic number, because the mean of its divisors is an integer number (596960).

Almost surely, 2^23533020 is an apocalyptic number.

23533020 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 23533020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42981120).

23533020 is an abundant number, since it is smaller than the sum of its proper divisors (62429220).

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

23533020 is a wasteful number, since it uses less digits than its factorization.

23533020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 18.

The square root of 23533020 is about 4851.0844148499. The cubic root of 23533020 is about 286.5668091593.

Adding to 23533020 its reverse (2033532), we get a palindrome (25566552).

The spelling of 23533020 in words is "twenty-three million, five hundred thirty-three thousand, twenty".