20806132 has 6 divisors (see below), whose sum is σ = 36410738. Its totient is φ = 10403064.

The previous prime is 20806127. The next prime is 20806141. The reversal of 20806132 is 23160802.

It can be written as a sum of positive squares in only one way, i.e., 13868176 + 6937956 = 3724^2 + 2634^2 .

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2600763 + ... + 2600770.

Almost surely, 2^20806132 is an apocalyptic number.

It is an amenable number.

20806132 is a deficient number, since it is larger than the sum of its proper divisors (15604606).

20806132 is a wasteful number, since it uses less digits than its factorization.

20806132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5201537 (or 5201535 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20806132 is about 4561.3739158284. The cubic root of 20806132 is about 275.0407961515.

Adding to 20806132 its reverse (23160802), we get a palindrome (43966934).

The spelling of 20806132 in words is "twenty million, eight hundred six thousand, one hundred thirty-two".