20525288 has 32 divisors (see below), whose sum is σ = 44160960. Its totient is φ = 8760960.

The previous prime is 20525287. The next prime is 20525299. The reversal of 20525288 is 88252502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20525287) 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 7 ways as a sum of consecutive naturals, for example, 16943 + ... + 18113.

It is an arithmetic number, because the mean of its divisors is an integer number (1380030).

Almost surely, 2^20525288 is an apocalyptic number.

20525288 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20525288 is an abundant number, since it is smaller than the sum of its proper divisors (23635672).

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

20525288 is a wasteful number, since it uses less digits than its factorization.

20525288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 20525288 is about 4530.4843008226. The cubic root of 20525288 is about 273.7976732858.

The spelling of 20525288 in words is "twenty million, five hundred twenty-five thousand, two hundred eighty-eight".