20500575 has 24 divisors (see below), whose sum is σ = 34457616. Its totient is φ = 10752000.

The previous prime is 20500541. The next prime is 20500577. The reversal of 20500575 is 57500502.

It is not a de Polignac number, because 20500575 - 2⁶ = 20500511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20500577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2335 + ... + 6815.

It is an arithmetic number, because the mean of its divisors is an integer number (1435734).

Almost surely, 2^20500575 is an apocalyptic number.

20500575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20500575 is a deficient number, since it is larger than the sum of its proper divisors (13957041).

20500575 is a wasteful number, since it uses less digits than its factorization.

20500575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4555 (or 4550 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 24.

The square root of 20500575 is about 4527.7560667509. The cubic root of 20500575 is about 273.6877425612.

The spelling of 20500575 in words is "twenty million, five hundred thousand, five hundred seventy-five".