20555928 has 48 divisors (see below), whose sum is σ = 58097520. Its totient is φ = 6553536.

The previous prime is 20555923. The next prime is 20555947. The reversal of 20555928 is 82955502.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20555892 and 20555901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555921) 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 11 ways as a sum of consecutive naturals, for example, 4551 + ... + 7862.

It is an arithmetic number, because the mean of its divisors is an integer number (1210365).

Almost surely, 2^20555928 is an apocalyptic number.

It is an amenable number.

20555928 is an abundant number, since it is smaller than the sum of its proper divisors (37541592).

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

20555928 is a wasteful number, since it uses less digits than its factorization.

20555928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12448 (or 12441 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 20555928 is about 4533.8645767160. The cubic root of 20555928 is about 273.9338466043.

The spelling of 20555928 in words is "twenty million, five hundred fifty-five thousand, nine hundred twenty-eight".