20000724 has 12 divisors (see below), whose sum is σ = 46668384. Its totient is φ = 6666904.

The previous prime is 20000723. The next prime is 20000753. The reversal of 20000724 is 42700002.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833352 + ... + 833375.

It is an arithmetic number, because the mean of its divisors is an integer number (3889032).

Almost surely, 2^20000724 is an apocalyptic number.

It is an amenable number.

20000724 is an abundant number, since it is smaller than the sum of its proper divisors (26667660).

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

20000724 is a wasteful number, since it uses less digits than its factorization.

20000724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666734 (or 1666732 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 20000724 is about 4472.2168999278. The cubic root of 20000724 is about 271.4450370172.

Adding to 20000724 its reverse (42700002), we get a palindrome (62700726).

The spelling of 20000724 in words is "twenty million, seven hundred twenty-four", and thus it is an aban number.