23621940 has 72 divisors (see below), whose sum is σ = 75435360. Its totient is φ = 5966784.

The previous prime is 23621929. The next prime is 23621957. The reversal of 23621940 is 4912632.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34 + ... + 6873.

Almost surely, 2^23621940 is an apocalyptic number.

23621940 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 23621940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37717680).

23621940 is an abundant number, since it is smaller than the sum of its proper divisors (51813420).

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

23621940 is a wasteful number, since it uses less digits than its factorization.

23621940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6941 (or 6936 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 23621940 is about 4860.2407347785. The cubic root of 23621940 is about 286.9272883742.

The spelling of 23621940 in words is "twenty-three million, six hundred twenty-one thousand, nine hundred forty".