20724352 has 64 divisors (see below), whose sum is σ = 46267200. Its totient is φ = 9164800.

The previous prime is 20724349. The next prime is 20724359. The reversal of 20724352 is 25342702.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (20724359) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57549 + ... + 57907.

It is an arithmetic number, because the mean of its divisors is an integer number (722925).

Almost surely, 2^20724352 is an apocalyptic number.

20724352 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 20724352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23133600).

20724352 is an abundant number, since it is smaller than the sum of its proper divisors (25542848).

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

20724352 is a wasteful number, since it uses less digits than its factorization.

20724352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 20724352 is about 4552.4006853527. The cubic root of 20724352 is about 274.6799670982.

The spelling of 20724352 in words is "twenty million, seven hundred twenty-four thousand, three hundred fifty-two".