20559075 has 12 divisors (see below), whose sum is σ = 33991128. Its totient is φ = 10964800.

The previous prime is 20559067. The next prime is 20559113. The reversal of 20559075 is 57095502.

It is not a de Polignac number, because 20559075 - 2³ = 20559067 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136986 + ... + 137135.

It is an arithmetic number, because the mean of its divisors is an integer number (2832594).

Almost surely, 2^20559075 is an apocalyptic number.

20559075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20559075 is a deficient number, since it is larger than the sum of its proper divisors (13432053).

20559075 is a wasteful number, since it uses less digits than its factorization.

20559075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274134 (or 274129 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 33.

The square root of 20559075 is about 4534.2116183522. The cubic root of 20559075 is about 273.9478251482.

The spelling of 20559075 in words is "twenty million, five hundred fifty-nine thousand, seventy-five".