20443632 has 80 divisors (see below), whose sum is σ = 59520000. Its totient is φ = 5990400.

The previous prime is 20443627. The next prime is 20443667. The reversal of 20443632 is 23634402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15744 + ... + 16992.

It is an arithmetic number, because the mean of its divisors is an integer number (744000).

Almost surely, 2^20443632 is an apocalyptic number.

20443632 is a gapful number since it is divisible by the number (22) 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 20443632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29760000).

20443632 is an abundant number, since it is smaller than the sum of its proper divisors (39076368).

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

20443632 is a wasteful number, since it uses less digits than its factorization.

20443632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 1296 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 20443632 is about 4521.4634798923. The cubic root of 20443632 is about 273.4341065397.

The spelling of 20443632 in words is "twenty million, four hundred forty-three thousand, six hundred thirty-two".