20085724 has 12 divisors (see below), whose sum is σ = 35746200. Its totient is φ = 9872528.

The previous prime is 20085713. The next prime is 20085727. The reversal of 20085724 is 42758002.

It is a junction number, because it is equal to n+sod(n) for n = 20085692 and 20085701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20085727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42319 + ... + 42790.

It is an arithmetic number, because the mean of its divisors is an integer number (2978850).

Almost surely, 2^20085724 is an apocalyptic number.

It is an amenable number.

20085724 is a deficient number, since it is larger than the sum of its proper divisors (15660476).

20085724 is a wasteful number, since it uses less digits than its factorization.

20085724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85172 (or 85170 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 20085724 is about 4481.7099415290. The cubic root of 20085724 is about 271.8290267797.

The spelling of 20085724 in words is "twenty million, eighty-five thousand, seven hundred twenty-four".