20559051 has 6 divisors (see below), whose sum is σ = 29696420. Its totient is φ = 13706028.

The previous prime is 20559047. The next prime is 20559061. The reversal of 20559051 is 15095502.

20559051 is a `hidden beast` number, since 20 + 5 + 590 + 51 = 666.

It is not a de Polignac number, because 20559051 - 2² = 20559047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20559041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1142161 + ... + 1142178.

Almost surely, 2^20559051 is an apocalyptic number.

20559051 is a deficient number, since it is larger than the sum of its proper divisors (9137369).

20559051 is a wasteful number, since it uses less digits than its factorization.

20559051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284345 (or 2284342 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 20559051 is about 4534.2089718053. The cubic root of 20559051 is about 273.9477185489.

The spelling of 20559051 in words is "twenty million, five hundred fifty-nine thousand, fifty-one".