20345528 has 16 divisors (see below), whose sum is σ = 43597680. Its totient is φ = 8719488.

The previous prime is 20345519. The next prime is 20345531. The reversal of 20345528 is 82554302.

It is a self number, because there is not a number n which added to its sum of digits gives 20345528.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 181601 + ... + 181712.

It is an arithmetic number, because the mean of its divisors is an integer number (2724855).

Almost surely, 2^20345528 is an apocalyptic number.

20345528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20345528 is an abundant number, since it is smaller than the sum of its proper divisors (23252152).

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

20345528 is a wasteful number, since it uses less digits than its factorization.

20345528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363326 (or 363322 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 20345528 is about 4510.6017336936. The cubic root of 20345528 is about 272.9960238612.

The spelling of 20345528 in words is "twenty million, three hundred forty-five thousand, five hundred twenty-eight".