20533724 has 12 divisors (see below), whose sum is σ = 36338400. Its totient is φ = 10151328.

The previous prime is 20533717. The next prime is 20533727. The reversal of 20533724 is 42733502.

It is a junction number, because it is equal to n+sod(n) for n = 20533693 and 20533702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20533727) 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, 28484 + ... + 29195.

It is an arithmetic number, because the mean of its divisors is an integer number (3028200).

Almost surely, 2^20533724 is an apocalyptic number.

It is an amenable number.

20533724 is a deficient number, since it is larger than the sum of its proper divisors (15804676).

20533724 is a wasteful number, since it uses less digits than its factorization.

20533724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57772 (or 57770 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 26.

The square root of 20533724 is about 4531.4152314702. The cubic root of 20533724 is about 273.8351789033.

The spelling of 20533724 in words is "twenty million, five hundred thirty-three thousand, seven hundred twenty-four".