20525755 has 4 divisors (see below), whose sum is σ = 24630912. Its totient is φ = 16420600.

The previous prime is 20525753. The next prime is 20525759. The reversal of 20525755 is 55752502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20525755 - 2¹ = 20525753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20525753) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2052571 + ... + 2052580.

It is an arithmetic number, because the mean of its divisors is an integer number (6157728).

Almost surely, 2^20525755 is an apocalyptic number.

20525755 is a deficient number, since it is larger than the sum of its proper divisors (4105157).

20525755 is an equidigital number, since it uses as much as digits as its factorization.

20525755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4105156.

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

The square root of 20525755 is about 4530.5358402732. The cubic root of 20525755 is about 273.7997497900.

The spelling of 20525755 in words is "twenty million, five hundred twenty-five thousand, seven hundred fifty-five".