20559534 has 16 divisors (see below), whose sum is σ = 41582160. Its totient is φ = 6776000.

The previous prime is 20559529. The next prime is 20559551. The reversal of 20559534 is 43595502.

It is a junction number, because it is equal to n+sod(n) for n = 20559495 and 20559504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18717 + ... + 19784.

It is an arithmetic number, because the mean of its divisors is an integer number (2598885).

Almost surely, 2^20559534 is an apocalyptic number.

20559534 is an abundant number, since it is smaller than the sum of its proper divisors (21022626).

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

20559534 is a wasteful number, since it uses less digits than its factorization.

20559534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38595.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 20559534 is about 4534.2622332635. The cubic root of 20559534 is about 273.9498638443.

The spelling of 20559534 in words is "twenty million, five hundred fifty-nine thousand, five hundred thirty-four".