20065506 has 16 divisors (see below), whose sum is σ = 41515200. Its totient is φ = 6457808.

The previous prime is 20065489. The next prime is 20065531. The reversal of 20065506 is 60556002.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 57486 + ... + 57833.

It is an arithmetic number, because the mean of its divisors is an integer number (2594700).

Almost surely, 2^20065506 is an apocalyptic number.

20065506 is an abundant number, since it is smaller than the sum of its proper divisors (21449694).

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

20065506 is a wasteful number, since it uses less digits than its factorization.

20065506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115353.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 20065506 is about 4479.4537613419. The cubic root of 20065506 is about 271.7377897680.

The spelling of 20065506 in words is "twenty million, sixty-five thousand, five hundred six".