20556914 has 16 divisors (see below), whose sum is σ = 35738496. Its totient is φ = 8685600.

The previous prime is 20556889. The next prime is 20556923. The reversal of 20556914 is 41965502.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9347 + ... + 11334.

It is an arithmetic number, because the mean of its divisors is an integer number (2233656).

Almost surely, 2^20556914 is an apocalyptic number.

20556914 is a deficient number, since it is larger than the sum of its proper divisors (15181582).

20556914 is a wasteful number, since it uses less digits than its factorization.

20556914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20761.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 20556914 is about 4533.9733126696. The cubic root of 20556914 is about 273.9382264350.

The spelling of 20556914 in words is "twenty million, five hundred fifty-six thousand, nine hundred fourteen".