20555528 has 32 divisors (see below), whose sum is σ = 44193600. Its totient is φ = 8780352.

The previous prime is 20555527. The next prime is 20555551. The reversal of 20555528 is 82555502.

It is a super-3 number, since 3×20555528³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20555494 and 20555503.

It is not an unprimeable number, because it can be changed into a prime (20555527) 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, 30863 + ... + 31521.

It is an arithmetic number, because the mean of its divisors is an integer number (1381050).

Almost surely, 2^20555528 is an apocalyptic number.

20555528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20555528 is an abundant number, since it is smaller than the sum of its proper divisors (23638072).

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

20555528 is a wasteful number, since it uses less digits than its factorization.

20555528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 20555528 is about 4533.8204640237. The cubic root of 20555528 is about 273.9320697568.

The spelling of 20555528 in words is "twenty million, five hundred fifty-five thousand, five hundred twenty-eight".