20528755 has 32 divisors (see below), whose sum is σ = 27760320. Its totient is φ = 14476800.

The previous prime is 20528743. The next prime is 20528777. The reversal of 20528755 is 55782502.

It is not a de Polignac number, because 20528755 - 2¹⁵ = 20495987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20528755.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203205 + ... + 203305.

It is an arithmetic number, because the mean of its divisors is an integer number (867510).

Almost surely, 2^20528755 is an apocalyptic number.

20528755 is a deficient number, since it is larger than the sum of its proper divisors (7231565).

20528755 is a wasteful number, since it uses less digits than its factorization.

20528755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231.

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 20528755 is about 4530.8669148409. The cubic root of 20528755 is about 273.8130884668.

The spelling of 20528755 in words is "twenty million, five hundred twenty-eight thousand, seven hundred fifty-five".