23643620 has 96 divisors (see below), whose sum is σ = 66721536. Its totient is φ = 6796800.

The previous prime is 23643577. The next prime is 23643637. The reversal of 23643620 is 2634632.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 23643620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19430 + ... + 20610.

It is an arithmetic number, because the mean of its divisors is an integer number (695016).

Almost surely, 2^23643620 is an apocalyptic number.

23643620 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 23643620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33360768).

23643620 is an abundant number, since it is smaller than the sum of its proper divisors (43077916).

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

23643620 is a wasteful number, since it uses less digits than its factorization.

23643620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 23643620 is about 4862.4705654636. The cubic root of 23643620 is about 287.0150412785.

The spelling of 23643620 in words is "twenty-three million, six hundred forty-three thousand, six hundred twenty".