20525575 has 24 divisors (see below), whose sum is σ = 29649888. Its totient is φ = 13802880.

The previous prime is 20525573. The next prime is 20525587. The reversal of 20525575 is 57552502.

It is not a de Polignac number, because 20525575 - 2¹ = 20525573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8169 + ... + 10381.

It is an arithmetic number, because the mean of its divisors is an integer number (1235412).

Almost surely, 2^20525575 is an apocalyptic number.

20525575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20525575 is a deficient number, since it is larger than the sum of its proper divisors (9124313).

20525575 is a wasteful number, since it uses less digits than its factorization.

20525575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283 (or 2278 counting only the distinct ones).

The product of its (nonzero) digits is 17500, while the sum is 31.

The square root of 20525575 is about 4530.5159750298. The cubic root of 20525575 is about 273.7989494281.

The spelling of 20525575 in words is "twenty million, five hundred twenty-five thousand, five hundred seventy-five".