23721630 has 64 divisors (see below), whose sum is σ = 60844608. Its totient is φ = 5898240.

The previous prime is 23721629. The next prime is 23721637. The reversal of 23721630 is 3612732.

It is a self number, because there is not a number n which added to its sum of digits gives 23721630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23721637) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98310 + ... + 98550.

It is an arithmetic number, because the mean of its divisors is an integer number (950697).

Almost surely, 2^23721630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23721630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30422304).

23721630 is an abundant number, since it is smaller than the sum of its proper divisors (37122978).

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

23721630 is a wasteful number, since it uses less digits than its factorization.

23721630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 23721630 is about 4870.4856020730. The cubic root of 23721630 is about 287.3303548636.

The spelling of 23721630 in words is "twenty-three million, seven hundred twenty-one thousand, six hundred thirty".