20550812 has 12 divisors (see below), whose sum is σ = 36368640. Its totient is φ = 10159776.

The previous prime is 20550809. The next prime is 20550857. The reversal of 20550812 is 21805502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28508 + ... + 29219.

It is an arithmetic number, because the mean of its divisors is an integer number (3030720).

Almost surely, 2^20550812 is an apocalyptic number.

It is an amenable number.

20550812 is a deficient number, since it is larger than the sum of its proper divisors (15817828).

20550812 is a wasteful number, since it uses less digits than its factorization.

20550812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57820 (or 57818 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 20550812 is about 4533.3003430172. The cubic root of 20550812 is about 273.9111189863.

The spelling of 20550812 in words is "twenty million, five hundred fifty thousand, eight hundred twelve".