20539672 has 16 divisors (see below), whose sum is σ = 40777560. Its totient is φ = 9665664.

The previous prime is 20539643. The next prime is 20539679. The reversal of 20539672 is 27693502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20539679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75378 + ... + 75649.

Almost surely, 2^20539672 is an apocalyptic number.

It is an amenable number.

20539672 is a deficient number, since it is larger than the sum of its proper divisors (20237888).

20539672 is a wasteful number, since it uses less digits than its factorization.

20539672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151050 (or 151046 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 20539672 is about 4532.0714910513. The cubic root of 20539672 is about 273.8616169457.

The spelling of 20539672 in words is "twenty million, five hundred thirty-nine thousand, six hundred seventy-two".